Wednesday, November 12, 2014

Molecular Modeling of Prion Transmission to Humans

ISSN 1999-4915

 

www.mdpi.com/journal/viruses

 

Article

 

Molecular Modeling of Prion Transmission to Humans

 

Etienne Levavasseur 1, Nicolas Privat 1, Juan-Carlos Espinosa Martin 2, Steve Simoneau 3, Thierry Baron 4, Benoit Flan 3, Juan-Maria Torres 2 and Stéphane Haïk 1,5,6,* 1 Inserm U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Univ. Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle épinière, ICM, 75013 Paris, France; E-Mails: etienne.levavasseur@inserm.fr (E.L.); nicolas.privat@inserm.fr (N.P.) 2 Centro de Investigacion en Sanidad Animal, Carretera de Algete a El Casar, 28130 Madrid, Spain; E-Mails: espinosa.juan@inia.es (J.-C.E.M.); jmtorres@inia.es (J.-M.T.) 3 LFB Biomédicaments, 91958 Les Ulis, France; E-Mails: simoneaus@lfb.fr (S.S.); flan@lfb.fr (B.F.) 4 Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail (ANSES), Unité Maladies neurodégénératives, 69394 Lyon, France; E-Mail: thierry.baron@anses.fr 5 AP-HP, Hôpital de la Pitié-Salpêtrière, Cellule nationale de référence des MCJ, F-75013 Paris, France 6 AP-HP, Hôpital de la Pitié-Salpêtrière, Neuropathologie, 75013 Paris, France

 

* Author to whom correspondence should be addressed; E-Mail: stephane.haik@courriel.upmc.fr; Tel.: +33-142-162-628; Fax: +33-142-161-899. External Editor: Judd Aiken and Debbie McKenzie

 

Received: 24 July 2014; in revised form: 26 September 2014/ Accepted: 30 September 2014/ Published: 02 October 2014

 

Abstract:

 

Using different prion strains, such as the variant Creutzfeldt-Jakob disease agent and the atypical bovine spongiform encephalopathy agents, and using transgenic mice expressing human or bovine prion protein, we assessed the reliability of protein misfolding cyclic amplification (PMCA) to model interspecies and genetic barriers to prion transmission. We compared our PMCA results with in vivo transmission data characterized by attack rates, i.e., the percentage of inoculated mice that developed the disease. Using 19 seed/substrate combinations, we observed that a significant PMCA amplification was only obtained when the mouse line used as substrate is susceptible to the corresponding strain. Our results suggest that PMCA provides a useful tool to study genetic barriers to transmission and to study the zoonotic potential of emerging prion strains.

 

1. Introduction

 

Prion diseases are fatal transmissible disorders affecting humans and animals. They are characterized by brain vacuolization, neuronal loss and accumulation of PrPsc, an abnormal isoform of the host-encoded cellular prion protein (PrPc). PrPsc has been proposed as the infectious agent, capable of converting PrPc into PrPsc in an autocatalytical manner [1]. In humans, prion diseases result from contamination, genetic inheritance or sporadic event. The host susceptibility is influenced by the prion protein-encoding gene PRNP. For example, the variant of Creutzfeldt-Jakob disease (vCJD), which has been associated to the classical bovine spongiform encephalopathy (C-BSE) epidemics in cattle through contaminated meat product consumption [2], has occurred so far only in individuals homozygous for methionine at codon 129 of PRNP [3]. However, this finding has been under debate [4,5]. Studies have investigated interspecies and genotypic barriers [6,7] using an in vitro PrPsc amplification system named protein misfolding cyclic amplification (PMCA) [8]. This method allows, in PCR tubes, the amplification of minute amounts of PrPsc in infected tissues (seed) in the presence of normal brain homogenate in excess (substrate), after cycles of incubation and sonication. Then, the final product of the reaction can be detected after proteinase K digestion by Western blot. While PMCA allows the amplification of PrPsc, it has also been demonstrated that infectivity was increased during the reaction [9], and that prion strain properties were maintained throughout the reaction [10–12]. Brains from humans or transgenic mice expressing a human PrP with methionine at codon 129 of PRNP provided the best substrates to amplify vCJD and BSE PrPsc [6,7], suggesting that PMCA may reproduce faithfully the genotypic transmission barrier. It was thus proposed as a means to evaluate the zoonotic risk associated with emerging prion strains (Nor98 in sheep, L-type BSE in cattle). Indeed, while classical BSE strain has been recognized to be at the origin of vCJD in humans, L-BSE is considered to be a sporadic form of prion disease in cattle, differing in many aspects (epidemiology, neuropathology, biochemical features) from the C-BSE strain.

 

***Moreover, L-BSE has been transmitted more easily to transgenic mice overexpressing a human PrP [13,14] or to primates [15,16] than C-BSE.

 

***It has been suggested that some sporadic CJD subtypes in humans may result from an exposure to the L-BSE agent.

 

Lending support to this hypothesis, pathological and biochemical similarities have been observed between L-BSE and an sCJD subtype (MV genotype at codon 129 of PRNP) [17], and between L-BSE infected non-human primate and another sCJD subtype (MM genotype) [15].

 

Therefore, we investigated whether PMCA is reliable to model the genotypic and interspecies barrier of transmission notably using L-BSE and C-BSE strains. We assessed the seeding ability of PrPsc from human (vCJD) and animal (C-BSE, L-BSE) prion strains to convert human or bovine PrPc. The aim of the study was to compare, for each seed/substrate combination, the result obtained by PMCA with the transmission efficiency previously observed in vivo.

 

snip...

 


 

Monday, November 3, 2014

 

***In addition, non-human primates are specifically susceptible for atypical BSE as demonstrated by an approximately 50% shortened incubation time for L-type BSE as compared to C-type. Considering the current scientific information available, it cannot be assumed that these different BSE types pose the same human health risks as C-type BSE or that these risks are mitigated by the same protective measures.

 


 

BSE prions propagate as either variant CJD-like or sporadic CJD-like prion strains in transgenic mice expressing human prion protein

 

*** Surprisingly, however, BSE transmission to these transgenic mice, in addition to producing a vCJD-like phenotype, can also result in a distinct molecular phenotype that is indistinguishable from that of sporadic CJD with PrPSc type 2.

 

These data suggest that more than one BSEderived prion strain might infect humans;

 

***it is therefore possible that some patients with a phenotype consistent with sporadic CJD may have a disease arising from BSE exposure.

 

snip...

 

These studies further strengthen the evidence that vCJD is caused by a BSE-like prion strain.

 

Also, remarkably, the key neuropathological hallmark of vCJD, the presence of abundant florid PrP plaques, can be recapitulated on BSE or vCJD transmission to these mice.

 

***However, the most surprising aspect of the studies was the finding that an alternate pattern of disease can be induced in 129MM Tg35 mice from primary transmission of BSE, with a molecular phenotype indistinguishable from that of a subtype of sporadic CJD. This finding has important potential implications as it raises the possibility that some humans infected with BSE prions may develop a clinical disease indistinguishable from classical CJD associated with type 2 PrPSc. This is, in our experience, the commonest molecular sub-type of sporadic CJD. In this regard, it is of interest that the reported incidence of sporadic CJD has risen in the UK since the 1970s (Cousens et al., 1997)...

 


 

To date the OIE/WAHO assumes that the human and animal health standards set out in the BSE chapter for classical BSE (C-Type) applies to all forms of BSE which include the H-type and L-type atypical forms. This assumption is scientifically not completely justified and accumulating evidence suggests that this may in fact not be the case. Molecular characterization and the spatial distribution pattern of histopathologic lesions and immunohistochemistry (IHC) signals are used to identify and characterize atypical BSE. Both the L-type and H-type atypical cases display significant differences in the conformation and spatial accumulation of the disease associated prion protein (PrPSc) in brains of afflicted cattle. Transmission studies in bovine transgenic and wild type mouse models support that the atypical BSE types might be unique strains because they have different incubation times and lesion profiles when compared to C-type BSE. When L-type BSE was inoculated into ovine transgenic mice and Syrian hamster the resulting molecular fingerprint had changed, either in the first or a subsequent passage, from L-type into C-type BSE.

 

***In addition, non-human primates are specifically susceptible for atypical BSE as demonstrated by an approximately 50% shortened incubation time for L-type BSE as compared to C-type. Considering the current scientific information available, it cannot be assumed that these different BSE types pose the same human health risks as C-type BSE or that these risks are mitigated by the same protective measures.

 


 

-------- Original Message --------

 

Subject: re-BSE prions propagate as either variant CJD-like or sporadic CJD

 

Date: Thu, 28 Nov 2002 10:23:43 -0000

 

From: "Asante, Emmanuel A" e.asante@ic.ac.uk

 

To: "'flounder@wt.net'" flounder@wt.net

 

Dear Terry,

 

I have been asked by Professor Collinge to respond to your request. I am a Senior Scientist in the MRC Prion Unit and the lead author on the paper. I have attached a pdf copy of the paper for your attention.

 

Thank you for your interest in the paper.

 

In respect of your first question, the simple answer is, ***yes. As you will find in the paper, we have managed to associate the alternate phenotype to type 2 PrPSc, the commonest sporadic CJD. It is too early to be able to claim any further sub-classification in respect of Heidenhain variant CJD or Vicky Rimmer's version. It will take further studies, which are on-going, to establish if there are sub-types to our initial finding which we are now reporting. The main point of the paper is that, as well as leading to the expected new variant CJD phenotype, BSE transmission to the 129-methionine genotype can lead to an alternate phenotype which is indistinguishable from type 2 PrPSc.

 

I hope reading the paper will enlighten you more on the subject. If I can be of any further assistance please to not hesitate to ask. Best wishes.

 

Emmanuel Asante

 

<>

 

____________________________________

 

Dr. Emmanuel A Asante MRC Prion Unit & Neurogenetics Dept. Imperial College School of Medicine (St. Mary's) Norfolk Place, LONDON W2 1PG Tel: +44 (0)20 7594 3794 Fax: +44 (0)20 7706 3272 email: e.asante@ic.ac.uk (until 9/12/02) New e-mail: e.asante@prion.ucl.ac.uk (active from now)

 

____________________________________

 

Thursday, August 12, 2010

 

Seven main threats for the future linked to prions

 

First threat

 

The TSE road map defining the evolution of European policy for protection against prion diseases is based on a certain numbers of hypotheses some of which may turn out to be erroneous. In particular, a form of BSE (called atypical Bovine Spongiform Encephalopathy), recently identified by systematic testing in aged cattle without clinical signs, may be the origin of classical BSE and thus potentially constitute a reservoir, which may be impossible to eradicate if a sporadic origin is confirmed.

 

***Also, a link is suspected between atypical BSE and some apparently sporadic cases of Creutzfeldt-Jakob disease in humans. These atypical BSE cases constitute an unforeseen first threat that could sharply modify the European approach to prion diseases.

 

Second threat

 

snip...

 


 

Monday, October 10, 2011

 

EFSA Journal 2011 The European Response to BSE: A Success Story

 

snip...

 

EFSA and the European Centre for Disease Prevention and Control (ECDC) recently delivered a scientific opinion on any possible epidemiological or molecular association between TSEs in animals and humans (EFSA Panel on Biological Hazards (BIOHAZ) and ECDC, 2011). This opinion confirmed Classical BSE prions as the only TSE agents demonstrated to be zoonotic so far

 

*** but the possibility that a small proportion of human cases so far classified as "sporadic" CJD are of zoonotic origin could not be excluded. Moreover, transmission experiments to non-human primates suggest that some TSE agents in addition to Classical BSE prions in cattle (namely L-type Atypical BSE, Classical BSE in sheep, transmissible mink encephalopathy (TME) and chronic wasting disease (CWD) agents) might have zoonotic potential.

 

snip...

 


 


 

2014

 

***Moreover, L-BSE has been transmitted more easily to transgenic mice overexpressing a human PrP [13,14] or to primates [15,16] than C-BSE.

 

***It has been suggested that some sporadic CJD subtypes in humans may result from an exposure to the L-BSE agent. Lending support to this hypothesis, pathological and biochemical similarities have been observed between L-BSE and an sCJD subtype (MV genotype at codon 129 of PRNP) [17], and between L-BSE infected non-human primate and another sCJD subtype (MM genotype) [15].

 

snip...

 


 

*** Singeltary reply ; Molecular, Biochemical and Genetic Characteristics of BSE in Canada Singeltary reply ;

 


 

4th MAD COW DISEASE U.S.A. CALIFORNIA ATYPICAL L-TYPE BASE BSE 2012

 


 

Saturday, August 4, 2012

 

*** Final Feed Investigation Summary - California atypical BASE BSE Case - July 2012 (ATYPICAL L-TYPE BASE BSE)

 


 

Discussion: The C, L and H type BSE cases in Canada exhibit molecular characteristics similar to those described for classical and atypical BSE cases from Europe and Japan. *** This supports the theory that the importation of BSE contaminated feedstuff is the source of C-type BSE in Canada. *** It also suggests a similar cause or source for atypical BSE in these countries. ***

 

see page 176 of 201 pages...tss

 


 

I think they still test the lowest possible by oie standards, to keep them in line for trade, which is about 40,000 a year, from 95 million or so...tss

 

USDA NEVER GOT STARTED GOOD BEFORE SHUTTING DOWN $$$

 

Why is USDA "only" testing 40,000 samples a year? USDA's surveillance strategy is to focus on the targeted populations where we are most likely to find disease if it is present. This is the most effective way to meet both OIE and our domestic surveillance standards. After completing our enhanced surveillance in 2006 and confirming that our BSE prevalence was very low, we concluded that 40,000 samples per year from these targeted, high risk populations would far exceed these standards. In fact, this sampling is ten times greater than OIE standards .

 


 

The total number of cattle and calves in the U.S. on January 1, 2014, was 87.73 million head, down 1.8% from January 2013 and 9.2% lower than at the last cyclical peak in 2007. This is the lowest January cattle inventory since 1951, _supposedly_, due to the drought, but I have my concern with that. the 2004 enhanced BSE surveillance program was shut down after finding two mad cows (atypical's), and in my opinion, that's why they shut it down. also, Dr. Paul Brown from the cdc said he trusted nothing from them after the Texas 2nd mad cow was covered up for months and months, on what was suppose to be a 48 hour turn around on testing. he said this ;

 

"Everything they did on the Texas cow makes everything USDA did before 2005 suspect," Brown said. (see link below).

 

the rest is history ;

 

An Arizona meat processing company and its owner pled guilty in February 2007 to charges of theft of Government funds, mail fraud, and wire fraud. The owner and his company defrauded the BSE Surveillance Program when they falsified BSE Surveillance Data Collection Forms and then submitted payment requests to USDA for the services. In addition to the targeted sample population (those cattle that were more than 30 months old or had other risk factors for BSE), the owner submitted to USDA, or caused to be submitted, BSE obex (brain stem) samples from healthy USDA-inspected cattle. As a result, the owner fraudulently received approximately $390,000. Sentencing is scheduled for May 2007.

 

snip...

 

Topics that will be covered in ongoing or planned reviews under Goal 1 include:

 

soundness of BSE maintenance sampling (APHIS),

 

implementation of Performance-Based Inspection System enhancements for specified risk material (SRM) violations and improved inspection controls over SRMs (FSIS and APHIS),

 

snip...

 

The findings and recommendations from these efforts will be covered in future semiannual reports as the relevant audits and investigations are completed.

 

4 USDA OIG SEMIANNUAL REPORT TO CONGRESS FY 2007 1st Half

 


 

Office of the United States Attorney District of Arizona FOR IMMEDIATE RELEASE For Information Contact Public Affairs February 16, 2007 WYN HORNBUCKLE Telephone: (602) 514-7625 Cell: (602) 525-2681

 

CORPORATION AND ITS PRESIDENT PLEAD GUILTY TO DEFRAUDING GOVERNMENT’S MAD COW DISEASE SURVEILLANCE PROGRAM

 

PHOENIX -- Farm Fresh Meats, Inc. and Roland Emerson Farabee, 55, of Maricopa, Arizona, pleaded guilty to stealing $390,000 in government funds, mail fraud and wire fraud, in federal district court in Phoenix. U.S. Attorney Daniel Knauss stated, “The integrity of the system that tests for mad cow disease relies upon the honest cooperation of enterprises like Farm Fresh Meats. Without that honest cooperation, consumers both in the U.S. and internationally are at risk.

 


 

WE can only hope that this is a single incident. BUT i have my doubts. I remember when the infamous TOKEN Purina Feed Mill in Texas was feeding up to 5.5 grams of potentially and probably tainted BANNED RUMINANT feed to cattle, and the FDA was bragging at the time that the amount of potentially BANNED product was so little and the cattle were so big ;

 

"It is important to note that the prohibited material was domestic in origin (therefore not likely to contain infected material because there is no evidence of BSE in U.S. cattle), fed at a very low level, and fed only once. The potential risk of BSE to such cattle is therefore exceedingly low, even if the feed were contaminated."

 


 

On Friday, April 30 th , the Food and Drug Administration learned that a cow with central nervous system symptoms had been killed and shipped to a processor for rendering into animal protein for use in animal feed. ... FDA's investigation showed that the animal in question had already been rendered into "meat and bone meal" (a type of protein animal feed). Over the weekend FDA was able to track down all the implicated material. That material is being held by the firm, which is cooperating fully with FDA.

 


 

WE now know all that was a lie. WE know that literally Thousands of TONS of BANNED and most likely tainted product is still going out to commerce. WE know now and we knew then that .005 to a gram was lethal. WE know that CWD infected deer and elk, scrapie infected sheep, BSE and BASE infected cattle have all been rendered and fed back to livestock (including cattle) for human and animal consumption.

 

Paul Brown, known and respected TSE scientist, former TSE expert for the CDC said he had ''absolutely no confidence in USDA tests before one year ago'', and this was on March 15, 2006 ;

 

"The fact the Texas cow showed up fairly clearly implied the existence of other undetected cases," Dr. Paul Brown, former medical director of the National Institutes of Health's Laboratory for Central Nervous System Studies and an expert on mad cow-like diseases, told United Press International. "The question was, 'How many?' and we still can't answer that."

 

Brown, who is preparing a scientific paper based on the latest two mad cow cases to estimate the maximum number of infected cows that occurred in the United States, said he has "absolutely no confidence in USDA tests before one year ago" because of the agency's reluctance to retest the Texas cow that initially tested positive.

 

USDA officials finally retested the cow and confirmed it was infected seven months later, but only at the insistence of the agency's inspector general.

 

"Everything they did on the Texas cow makes everything USDA did before 2005 suspect," Brown said. ...snip...end

 


 

CDC - Bovine Spongiform Encephalopathy and Variant Creutzfeldt ... Dr. Paul Brown is Senior Research Scientist in the Laboratory of Central Nervous System ... Address for correspondence: Paul Brown, Building 36, Room 4A-05, ...

 


 

PAUL BROWN COMMENT TO ME ON THIS ISSUE

 

Tuesday, September 12, 2006 11:10 AM

 

"Actually, Terry, I have been critical of the USDA handling of the mad cow issue for some years, and with Linda Detwiler and others sent lengthy detailed critiques and recommendations to both the USDA and the Canadian Food Agency."

 

OR, what the Honorable Phyllis Fong of the OIG found ;

 

Finding 2 Inherent Challenges in Identifying and Testing High-Risk Cattle Still Remain

 


 

*** Singeltary reply ; Molecular, Biochemical and Genetic Characteristics of BSE in Canada Singeltary reply ;

 


 

Tuesday, August 12, 2014

 

MAD COW USDA TSE PRION COVER UP or JUST IGNORANCE, for the record AUGUST 2014

 


 

Thursday, October 02, 2014

 

[Docket No. APHIS-2013-0064] Concurrence With OIE Risk Designations for Bovine Spongiform Encephalopathy

 


 

Saturday, August 14, 2010

 

BSE Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY

 


 

2009 UPDATE ON ALABAMA AND TEXAS MAD COWS 2005 and 2006

 


 

***P.170: Potential detection of oral transmission of H type atypical BSE in cattle using in vitro conversion

 

Sandor Dudas, John G Gray, Renee Clark, and Stefanie Czub Canadian Food Inspection Agency; Lethbridge, AB Canada

 

Keywords: Atypical BSE, oral transmission, RT-QuIC

 

The detection of bovine spongiform encephalopathy (BSE) has had a significant negative impact on the cattle industry worldwide. In response, governments took actions to prevent transmission and additional threats to animal health and food safety. While these measures seem to be effective for controlling classical BSE, the more recently discovered atypical BSE has presented a new challenge. To generate data for risk assessment and control measures, we have challenged cattle orally with atypical BSE to determine transmissibility and mis-folded prion (PrPSc) tissue distribution. Upon presentation of clinical symptoms, animals were euthanized and tested for characteristic histopathological changes as well as PrPSc deposition.

 

The H-type challenged animal displayed vacuolation exclusively in rostral brain areas but the L-type challenged animal showed no evidence thereof. To our surprise, neither of the animals euthanized, which were displaying clinical signs indicative of BSE, showed conclusive mis-folded prion accumulation in the brain or gut using standard molecular or immunohistochemical assays. To confirm presence or absence of prion infectivity, we employed an optimized real-time quaking induced conversion (RT-QuIC) assay developed at the Rocky Mountain Laboratory, Hamilton, USA.

 

Detection of PrPSc was unsuccessful for brain samples tests from the orally inoculated L type animal using the RT-QuIC. It is possible that these negative results were related to the tissue sampling locations or that type specific optimization is needed to detect PrPSc in this animal. We were however able to consistently detect the presence of mis-folded prions in the brain of the H-type inoculated animal. Considering the negative and inconclusive results with other PrPSc detection methods, positive results using the optimized RT-QuIC suggests the method is extremely sensitive for H-type BSE detection. This may be evidence of the first successful oral transmission of H type atypical BSE in cattle and additional investigation of samples from these animals are ongoing.

 

P.169: PrPSc distribution in brain areas of a natural German H-type BSE case

 

Anne Balkema-Buschmann, Grit Priemer, Markus Keller, and Martin H Groschup Friedrich Loeffler Institut, Institute for Novel and Emerging Infectious Diseases; Greifswald, Insel Riems, Germany

 

Keywords: BSE H-type, brain, muscle

 

Ten years after the initial description of atypical BSE cases of the H-type and L-type, the distribution of PrPSc in different brain areas and peripheral tissues of natural cases of these BSE forms is still not fully understood. Intracerebral challenge experiments have been performed with both atypical BSE forms in cattle, and the distribution of the abnormal prion protein and infectivity has been analysed in a variety of tissues, confirming the general restriction to the central nervous system as it was already generally acknowledged for classical BSE, but showing a slightly earlier and stronger involvement of the peripheral nervous system and the skeletal muscle. www.landesbioscience.com Prion 105

 

However, data from cattle orally challenged with atypical BSE, which might mimic the natural situation, are not yet available. Unfortunately, for most natural cases of atypical BSE, only the obex region is available for further analysis. The PrPSc distribution in the brains of natural L-type BSE cases in Italy has been described in some detail, but comparably few such data are yet available for natural H-type cases. Here we describe the analysis of different brain areas and muscle samples of a natural H-type BSE case diagnosed in Germany in 2014, and compare these data with those obtained from the respective samples collected from cattle challenged intracerebrally with H-type BSE.

 

P.159: Transgenic mice overexpressing rabbit prion protein are susceptible to BSE, BASE and scrapie prion strains but resistant to CWD and atypical scrapie

 

Natalia Fernández-Borges,1 Enric Vidal,2 Belén Pintado,4 Hasier Eraña,1 Montserrat Ordóñez,3 Mercedes Márquez,5 Francesca Chianini,6 Dolors Fondevila,5 Manuel A Sánchez-Martín,7 Olivier Andréoletti,8 Mark P Dagleish,6 Martí Pumarola,5 and Joaquín Castilla1,3 1CIC bioGUNE; Parque tecnológico de Bizkaia; Derio; Bizkaia, Spain; 2Centre de Recerca en Sanitat Animal (CReSA); UAB-IR TA, Campus de la Universitat Autònoma de Barcelona; Bellaterra; Barcelona, Catalonia, Spain; 3IKERBASQUE; Basque Foundation for Science; Bilbao, Bizkaia, Spain; 4Centro Nacional de Biotecnología (CNB), Campus de Cantoblanco; Cantoblanco; Madrid, Spain; 5Department of Animal Medicine and Surgery; Veterinary faculty; Universitat Autònoma de Barcelona (UAB); Bellaterra (Cerdanyola del Vallès); Barcelona, Catalonia, Spain; 6Moredun Research Institute; Bush Loan, Penicuik, Scotland, UK; 7Unidad de Generación de OMGs. S.E.A. Department of Medicine; University of Salamanca; Salamanca, Spain; 8Ecole Nationale du Veterinaire; Service de Pathologie du Bétail; Toulouse, France

 

Interspecies transmission of prions is a well established phenomenon, both experimentally and in field conditions. Upon passage through new hosts prion strains have proven their capacity to change their properties. It is, in fact, a source of strain diversity which needs to be considered when assessing the potential risks associated with consumption of prion contaminated protein sources.

 

Rabbits were considered for decades a prion resistant species until proven recently otherwise. To determine the extent of rabbit susceptibility to prions and to assess their effects on the passage of different prion strains through this species, a transgenic mouse model overexpressing rabbit PrPC was developed (TgRab). Intracerebral challenges with prion strains originating from a variety of species including field isolates (SSBP1 scrapie, Nor98-like scrapie, BSE, BASE and CWD), experimental murine strains (ME7 and RML), experimentally obtained strains (sheepBSE) and strains obtained by in vitro crossing of the species barrier using saPMCA (BSE-RabPrPres, SSBP1-RabPrPres and CWD-RabPrPres) have been performed.

 

Interestingly, on first passage, TgRab were susceptible to the majority of prions tested with the exception of SSBP1 scrapie, CWD and Nor98 scrapie. Furthermore TgRab were capable of propagating strain-specific features such as differences in incubation periods, brain lesion and PrPd deposition profiles and PK resistant western blotting band patterns. Our results confirm previous studies shattering the myth that rabbits are resistant to prion infection and this should be taken into account when choosing protein sources to feed rabbits.

 

P.168: Evolution of the biological properties of L-BSE after passage in sheep with susceptible and resistant PrP genotypes

 

Michele A Di Bari, Umberto Agrimi, Claudia D’Agostino, Geraldina Riccardi, Stefano Marcon, Elena Esposito, Paolo Frassanito, Flavio Torriani, Shimon Simson, and Romolo Nonno Istituto Superiore di Sanità (ISS) Department of Veterinary Public Health and Food Safety; Rome, Italy

 

Background. Cattle L-BSE was efficiently transmitted to sheep with susceptible (QQ171) and resistant (QR171) PrP genotypes. 1 Notably, the PrPSc signature of L-BSE was preserved in QQ171 sheep but not in QR171 sheep.2 Notwithstanding, bioassay in transgenic mice expressing bovine or ovine (ARQ) PrPC showed that L-BSE strain was preserved in both, QQ171 and QR171 sheep-passaged L-BSE.3

 

Here we studied the biological properties of sheep-passaged L-BSE by bioassay in bank voles and transgenic mice expressing the ovine VRQ PrP (tg338), both characterized by a comparatively low susceptibility to cattle L-BSE.

 

Material and Methods. Voles and tg338 mice were intracerebrally inoculated with cattle L-BSE and sheep-passaged (QQ171 and QR171) L-BSE isolates. Survival time, lesion profiles, Pet-blot and WB analysis were used for strain typing. Results. Cattle L-BSE transmitted quite inefficiently to tg338 mice, with survival time >400 days post-infection (d.p.i.), while sheep-passaged inocula were much more efficient and all gave terminal disease by ~140 d.p.i. However, after sub-passage all inocula converged to a survival time of ~145 d.p.i.. and showed overlapping pathological phenotypes.

 

In voles, cattle L-BSE transmitted with very long survival times (~800 d.p.i.) and was accompanied by an upward shift of the PrPSc type. Again, all sheep-passaged L-BSE isolates transmitted much more efficiently, with similar survival times of ~360 d.p.i.. Upon second passage, three different strains were isolated in vole, characterized by distinct pathological phenotypes. This divergence is epitomized by the different survival times of vole-adapted L-BSE strains, which were ~400 d.p.i. for cattle L-BSE, ~130 d.p.i. for QQ171-passaged L-BSE and ~225 d.p.i. for QR171-passaged L-BSE.

 

Conclusions. These findings, along with previously published data,3 show that the original L-BSE strain was recovered after passage in sheep when bioassay was performed in animal models expressing bovine or ovine PrPC. In contrast, strain changes were observed in both, QQ171- and QR171-passaged L-BSE by bioassay in vole, a species with divergent PrP sequence compared to ruminants. Importantly, QQ171- and QR171-passaged L-BSE were characterised by different PrPSc types and, accordingly, showed different biological properties when transmitted to voles, but not when transmitted to other animal models.

 

Overall, our work support the hypothesis that prion isolates are likely composed of multiple prion components, emphasizes the role of host PrP polymorphisms on strain selection and mutation, and highlights the risk for new potentially zoonotic strains that could emerge from prion evolution in animal reservoirs.

 

P.172: BSE exposure risk from bovine intestine and mesentery

 

Fulvio Barizzone,1 Herbert Budka,2 Christine Fast,3 John N Griffin,4 Giuseppe Ru,5 Pietro Stella1 and Olivier Andréoletti6 1European Food Safety Authority; Parma, Italy; 2Institute of Neuropathology; University Hospital Zurich; Zurich, Switzerland; 3Friedrich-Loeffler-Institut; Institute of Novel and Emerging Infectious Diseases; Isle of Riems, Germany; 4Department of Agriculture, Food and the Marine; Backweston, Celbridge, Co. Kildare, Ireland; 5Istituto Zooprofilattico Sperimentale del Piemonte; Liguria e Valle d’Aosta; Biostatistics Epidemiology and Analysis of Risk (BEAR) unit; Turin, Italy; 6UMR Interactions Hôtes Agents Pathogènes; Ecole Nationale Vétérinaire INR A; ENVT; Toulouse, France

 

Keywords: Bovine Spongiform Encephalopathy (BSE), cattle, intestine, mesentery, specified risk material (SRM), quantitative risk assessment (QRA)

 

Bovine intestines and mesenteries in the European Union (EU) are considered among the tissues potentially containing the highest level of BSE infectivity and have to be removed from the food and feed chain. A quantitative assessment of the BSE infectious load potentially entering the food and feed chain yearly in the European Union (EU) was developed. The evolution of the BSE infectious titre and of the weight of the structures accumulating infectivity was considered. The number of BSE infected cattle entering undetected in the food and feed chain yearly was estimated. A model (TSEi) was developed to estimates the evolution of the BSE infectious load in animals and the total yearly infectious load that could enter the food and feed chain. In a BSE infected bovine, the distribution of infectivity in intestines and mesentery varies with the age. Up to 36 months of age the infectivity is mainly associated (on average more than 90%) with the last 4 metres of small intestine and the caecum, over 36 and under 60 months of age, there is an inter-individual variability, from 60 months of age the infectivity is mainly associated (on average more than 90%) with the mesenteric nerves and the celiac and mesenteric ganglion complex. The total amount of infectivity peaks, about 15 BoID50, in animals younger than 18 months, it declines to 8-9 BoID50 (24–48 months of age) and it drops to 0.7 BoID50 in animals older than 60 months. The ileocaecal plate is the most infectious part of the intestine and it can be used to estimate the potential maximum level of exposure for an individual consumer.

 

In the EU, between 2007 and 2012, the yearly amount of BSE infectivity associated with intestine and mesentery from animals entering the food and feed chain was reduced by a factor of 10 (from about 23,000 to about 2,000 BoID50).

 

However, the maximum level of exposure to the BSE agent from intestine remained stable (on average about 1.5-1.6 BoID50 per meter).

 

In case of re-emergence of BSE in the EU there would be an increase of the potential maximum level of exposure to BSE from intestine. According to the TSEi model the removal of the last four metres of the small intestine and of the caecum from the food and feed chain would result in a major reduction of the BSE exposure risk associated with intestine and mesentery in cattle.

 

P.131: Transmission of sheep-bovine spongiform encephalopathy in pigs

 

Carlos Hedman,1 Belén Marín,1 Fabian Corbière,3 Hicham Filali,1 Francisco Vázquez, José Luis Pitarch,1 William Jirón,1 Rodrigo S Hernandez,1 Bernardino Moreno,1 Martí Pumarola,2 Olivier Andréoletti,3 Juan José Badiola,1 and Rosa Bolea1 1University of Zaragoza; Zaragoza, Spain; 2University of Barcelona; Barcelona, Spain; 3Institut National de la Recherche (INR A); Toulouse, France

 

Introduction. The transmissible spongiform encephalopathies (TSE) don´t occur in swine in natural conditions. However, the bovine spongiform encephalopathy (BSE) agent, inoculated by 3 simultaneous routes in pigs, is able to reproduce a neurological disease in these animals. On the other hand, the BSE agent after passage in sheep under experimental conditions (sheep- BSE) exhibits altered pathobiologic properties. This new agent is able to cross the cattle-pig transmission barrier more efficiently than BSE. The potential propagation of TSE in animals from the human food chain, including pigs, needs to be assessed regarding the risk for human infection by animals other than TSE-infected ruminants. The aim of this work was to determine the susceptibility of pigs to the Sheep-BSE agent and describe the pathological findings and PrPSc deposition in different tissues.

 

Material and Methods. Seven minipigs were challenged intracerebrally with sheep-BSE agent. Clinical observation and postmortem histopathology, immunohistochemistry (antibody 2G11) and Western blotting were performed on central nervous system (CNS), peripheral nervous system (PNS) and other tissues.

 

Results. One pig was culled in an early incubation stage, and remaining six were culled at the presence of clinical sings. Pigs developed a clinical disease with locomotor disorders in an average time of 23 months post inoculation, showing clinical findings in most of them earlier than those described in the BSE in pigs experimental infection. TSE wasn´t confirmed in the preclinical pig. In clinical pigs, the entire cerebral cortex showed severe neuropil vacuolation, extensive and severe vacuolar changes affecting the thalamus, hippocampus and cerebellum. PrPSc was found in CNS of all clinical pigs (6/6). Intracellular (intraneuronal and intraglial) and neuropil-associated PrPSc deposition was consistently observed in the brainstem, thalamus, and deeper layers of the cerebral cortex. Also, PrPSc was observed in PNS, mainly in the myenteric plexus and also in nerves belonging to the skeleton muscle. Moreover, the glycosylation profile showed a 3 band pattern with a predominant monoglycosylated band in positive pig samples.

 

This features concern on the potential risk of utilization of meat and bound meal of small ruminants in feeding pigs.

 

P.177: Elements modulating the prion species barrier and its passage consequences

 

Juan-Carlos Espinosa,1 Patricia Aguilar-Calvo,1 Ana Villa-Diaz,1 Olivier Andréoletti,2 and Juan María Torres1 1Centro de Investigación en Sanidad Animal (CISA-INI A); Valdeolmos, Madrid, Spain; 2UMR INR A-ENVT 1225; Interactions Hôte Agent Pathogène; École Nationale Vétérinaire de Toulouse; Toulouse, France

 

The phenotypic features of Transmissible Spongiform Encephalopathy (TSE) strains may be modified during passage across a species barrier. In this study we investigated the biochemical and biological characteristics of Bovine Spongiform Encephalopathy (BSE) infectious agent after transmission in both natural host species (cattle, sheep, pigs, and mice) and in transgenic mice overexpressing the corresponding cellular prion protein (PrPC) in comparison with other non-BSE related prions from the same species. After these passages, most characteristics of the BSE agent remained unchanged. BSE-derived agents only showed slight modifications in the biochemical properties of the accumulated PrPSc, which were demonstrated to be reversible upon re-inoculation into transgenic mice expressing bovine-PrPC. Transmission experiments in transgenic mice expressing bovine, porcine or human-PrP revealed that all BSE-derived agents were transmitted with no or a weak transmission barrier. In contrast, a high species barrier was observed for the non-BSE related prions that harboured an identical PrP amino acid sequence such as sheep-scrapie, mouse RML or human sCJD isolates, supporting the theory that the prion transmission barrier is modulated by strain properties (presumably conformation-dependent) rather than by PrP amino acid sequence differences between host and donor.

 

As identical results were observed with prions propagated either in natural hosts or in transgenic mouse models, we postulate that the species barrier and its passage consequences are uniquely governed by the host PrPC sequence and not influenced by the PrPC expression level or genetic factors other than the PrPC amino acid sequence. All these findings unequivocally demonstrate that the species barrier and its passage consequences are uniquely driven by the PrPC sequence, and not by other host genetic factors, demonstrating the validity of transgenic PrP animals as models for studies of the species barrier.

 

The results presented herein reinforce the idea that the BSE agent is highly promiscuous, infecting other species, maintaining its properties in the new species, and even increasing its capabilities to jump to other species including humans. These data are essential for the development of an accurate risk assessment for BSE.

 

P.150: Zoonotic potential of L-type BSE prions: A new prion disease in humans?

 

Emilie Jaumain,1 Stéphane Haïk,2 Isabelle Quadrio,3 Laetitia Herzog,1 Fabienne Reine,1 Armand Perret-Liaudet,3 Human Rezaei,1 Hubert Laude,1 Jean-Luc Vilotte,4 and Vincent Béringue1 1INR A (Institut National de la Recherche Agronomique); UR892; Virologie Immunologie Moléculaires; Jouy-en-Josas, France; 2IN SERM; Equipe maladie d’Alzheimer et maladies à Prions; CRicm; UMRS 1127; CNR S; UPMC. R.; ICM, Hôpital de la Salpêtrière; Paris, France; 3Neurobiologie, CMRR , Gériatrie, Hospices Civils de Lyon, Université Lyon 1-CNR S UMR5292-IN SERM U1028; Lyon, France; 3INR A; UMR1313; Génétique Animale et Biologie Intégrative; Jouy-en-Josas, France

 

Two novel prion strains, referred to as BSE-L and BSE-H, have been recognized in bovines through active prion surveillance programs, both being distinct from the epizootic, ‘classical’, BSE strain (C-BSE). Both H and L-types have been detected worldwide as rare cases occurring in aged animals. Like C-BSE prions, H- and L-types prions can propagate with relative ease in foreign species or in transgenic mouse lines expressing heterologous PrP sequences. A prion exhibiting biological properties similar to C-BSE agent sometimes emerged from these cross-species transmissions. Previously, L-type prions were shown to transmit to transgenic mice expressing human PrP with methionine at codon 129 with higher efficacy than C-BSE prions. Here, we examined whether L-type prions propagate without any apparent transmission barrier in these mice and whether such ‘humanised’ L-type prions share biological properties with CJD prions. L-type prions and a panel of human CJD cases with various genotypes at codon 129 and electrophoretic PrPres signatures were serially transmitted by intracerebral route to human PrP mice. The biological phenotypes induced by these agents were compared by all the standard methods currently used to distinguish between prion strains. At each passage, L-type prions were also transmitted back to bovine PrP mice to assess whether the agent has evolved upon passaging on the human PrP sequence. L-type prions transmitted to human PrP mice at 100% attack rate, without notable alteration in the mean incubation times over 5 passages. At each passage, ‘humanized’ L-type prions were able to transmit back to bovine PrP transgenic mice without apparent transmission barrier, as based on the survival time and the restoration of a L-type BSE phenotype. Comparison of mean incubation times on primary and subsequent passages in human PrP mice showed no overlap between L-type and sporadic CJD agents. While the electrophoretic signature and regional distribution of PrPres in L-type diseased mouse brains resembled that seen after transmission of MM2 CJD strain type, both agents exhibited distinct resistance of the associated PrPres molecules to protease denaturation.

 

In summary, L-type prions can be passaged on the human PrP sequence without any obvious transmission barrier. The phenotype obtained differs from the classical CJD prion types known so far. Careful extrapolation would suggest that the zoonotic transmission of this agent could establish a new prion disease type in humans.

 


 

Protein Structure and Biology

 


 

P.200: Clinical expression of BSE in mouse models is unrelated to hallmarks of prion diseases

 

Christelle Jas-Duval,1,2 Jacqueline Mikol,1 Sophie Luccantoni-Freire,1 Christine Defer,2 Jean-Jacques Huart,2 Paul Brown,1 Jean-Philippe Deslys,1 and Emmanuel E Comoy1 1CEA, Institute of Emerging Diseases and Innovative Therapies (iMETI), Division of Prions and Related Diseases (SEPIA); Fontenay-aux-Roses, France; 2EFS-Nord de France; Lille, France

 

Background. In 1997, we demonstrated that intracerebral inoculation of cattle BSE to C57Bl/6 mice induced neurological disease, even though half of the recipient animals were devoid of PrPres (Lasmezas et al., 1997). PrPres appeared with shortening incubation periods after subsequent passages, suggesting that detectable PrPres should be considered as an indicator of strain virulence rather than as a specific (and required) marker of prion diseases. Subsequent blood risk studies showed that cynomolgus macaques exposed to vCJD-contaminated blood products developed either classical vCJD or a novel neurological disease without detectable PrPres, In our continuing studies of this phenomenon, we now report the results of intravenous inoculations of several different wild-type mouse strains with bovine or primate BSE source material.

 

Materials and Methods. Brains from one bovine and one cynomolgus monkey showing clinical signs of BSE were sonicated and ultracentrifuged at 188,000 g for 1 hour. Resulting pellets and supernatants (equivalent to 2 mg of brain / mouse) were intravenously injected to PrP+/+ Swiss, PrP+/- and PrP+/+ C57Bl/6N mice, totalling 12 separate bioassays. PrPres was detected using conventional ELISA, western blotting and IHC procedures. Pathology was studied on formalin-fixed brain tissues.

 

Results. The transmission rate of BSE in those 12 experiments ranged from 0% (PrP+/- C57Bl/6N—cattle BSE—supernatant or pellet: no clinical sign, no spongiosis and no PrPres) to 100% (Swiss—primate BSE—supernatant or pellet: all mice exhibited clinical signs, spongiosis and PrPres). Overall, transmission was more efficient in (1) Swiss than C57Bl/6 mice, (2) PrP+/+ than PrP+/- mice, (3) primate than cattle BSE and (4) pellets than supernatant preparations. Among the 8 models exhibiting partial transmission ratios, 29 mice showed clinical neurological signs, of which only one-third (10) had detectable spongiosis and PrPres. The other animals exhibited only PrPres (7), only spongiosis (5) or neither (7).

 

Conclusion. Our results suggest that clinical neurotoxicity, spongiosis, and accumulation of PrPres are three interconnected but disparate phenomena. Spongiosis and PrPres are specific but not systematic hallmarks of the onset of prion diseases, notably upon first passage of non-adapted prion strains in a new host. These results question the universality of current human diagnostic criteria and the real prevalence of disease linked to BSE exposure.

 


 

Monday, June 23, 2014

 

PRION 2014 TYPICAL AND ATYPICAL BSE AND CJD REPORT UPDATES

 


 

Bovine Spongiform Encephalopathy BSE (typical and atypical strains) USDA

 

*** Saturday, November 2, 2013 ***

 

Exploring the risks of a putative transmission of BSE to new species

 


 

Wednesday, September 25, 2013

 

Presence of subclinical infection in gene-targeted human prion protein transgenic mice exposed to atypical BSE

 


 

I ask Professor Kong ; Thursday, December 04, 2008 3:37 PM

 

Subject: RE: re--Chronic Wating Disease (CWD) and Bovine Spongiform Encephalopathies (BSE): Public Health Risk Assessment

 

''IS the h-BSE more virulent than typical BSE as well, or the same as cBSE, or less virulent than cBSE? just curious.....'' Professor Kong reply ;

 

.....snip

 

*** ''As to the H-BSE, we do not have sufficient data to say one way or another, ***but we have found that H-BSE can infect humans. I hope we could publish these data once the study is complete. Thanks for your interest.''

 

Best regards, Qingzhong Kong, PhD Associate Professor Department of Pathology Case Western Reserve University Cleveland, OH 44106 USA

 

END...TSS

 

Thursday, December 04, 2008 2:37 PM

 

"we have found that H-BSE can infect humans."

 

personal communication with Professor Kong. ...TSS

 

BSE-H is also transmissible in our humanized Tg mice. The possibility of more than two atypical BSE strains will be discussed.

 

Supported by NINDS NS052319, NIA AG14359, and NIH AI 77774.

 


 


 

please see below from PRION2013 ;

 

*** This study imply the possibility that the novel BSE prions with high virulence in cattle will be emerged during intraspecies transmission.

 

AD.56: The emergence of novel BSE prions by serial passages of H-type BSE in bovinized mice

 

Kentaro Masujin, Naoko Tabeta, Ritsuko Miwa, Kohtaro Miyazawa, Hiroyuki Okada, Shirou Mohri and Takashi Yokoyama National Institute of Animal Health; Tsukuba, Japan

 

H-type bovine spongiform encephalopathy (BSE) is an atypical form of BSE, and has been detected in several European countries, and North America. Transmission studies of H-type BSE led to the emergence of the classical BSE (C-BSE) phenotypes during passages in inbred wild type and bovinized PrP-overexpressing transgenic mice. In this study, we conducted serial passages of Canadian H-type BSE isolate in bovinized PrP-overexpressing transgenic mice (TgBoPrP). H-type BSE isolate was transmitted to TgBoPrP with incubation periods of 320 ± 12.2 d at primary passage. The incubation period of 2nd and 3rd passage were constant (~= 220 d), no clear differences were observed in their biological and biochemical properties. However, at the forth passage, 2 different BSE phenotypes were confirmed; one is shorter survival times (109 ± 4 d) and the other is longer survival times. TgBoPrP mice with longer incubation period showed the H-type phenotype of PrPsc profile and pathology. However, those of shorter incubation period were different phenotypes from previously existed BSE prions (C-BSE, L-type BSE, and H-type BSE).

 

*** This study imply the possibility that the novel BSE prions with high virulence in cattle will be emerged during intraspecies transmission.

 


 

www.landesbioscience.com

 

please see ;

 

Thursday, August 15, 2013

 

The emergence of novel BSE prions by serial passages of H-type BSE in bovinized mice

 


 

Saturday, August 14, 2010 BSE

 

*** Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY

 


 

Sunday, September 1, 2013

 

*** Evaluation of the Zoonotic Potential of Transmissible Mink Encephalopathy

 

We previously described the biochemical similarities between PrPres derived from L-BSE infected macaque and cortical MM2 sporadic CJD: those observations suggest a link between these two uncommon prion phenotypes in a primate model (it is to note that such a link has not been observed in other models less relevant from the human situation as hamsters or transgenic mice overexpressing ovine PrP [28]). We speculate that a group of related animal prion strains (L-BSE, c-BSE and TME) would have a zoonotic potential and lead to prion diseases in humans with a type 2 PrPres molecular signature (and more specifically type 2B for vCJD)

 

snip...

 

Together with previous experiments performed in ovinized and bovinized transgenic mice and hamsters [8,9] indicating similarities between TME and L-BSE, the data support the hypothesis that L-BSE could be the origin of the TME outbreaks in North America and Europe during the mid-1900s.

 


 

Saturday, November 2, 2013

 

*** APHIS Finalizes Bovine Import Regulations in Line with International Animal Health Standards while enhancing the spread of BSE TSE prion mad cow type disease around the Globe ***

 


 

Singeltary Response to USDA, and USDA RESPONSE TO SINGELTARY ON HARVARD BSE RISK ASSESSMENT

 

Owens, Julie

 

From: Terry S. Singeltary Sr. [flounder9@verizon.net]

 

Sent: Monday, July 24, 2006 1:09 PM

 

To: FSIS RegulationsComments

 

Subject: [Docket No. FSIS-2006-0011] FSIS Harvard Risk Assessment of Bovine Spongiform Encephalopathy (BSE) Page 1 of 98

 


 

FSIS, USDA, REPLY TO SINGELTARY

 


 

USDA FDA TRIPLE MAD COW BSE FIREWALL

 

10,000,000+ LBS. of PROHIBITED BANNED MAD COW FEED I.E. BLOOD LACED MBM IN COMMERCE USA 2007

 

Date: March 21, 2007 at 2:27 pm PST

 

RECALLS AND FIELD CORRECTIONS: VETERINARY MEDICINES -- CLASS II

 

PRODUCT

 

Bulk cattle feed made with recalled Darling's 85% Blood Meal, Flash Dried, Recall # V-024-2007

 

CODE

 

Cattle feed delivered between 01/12/2007 and 01/26/2007

 

RECALLING FIRM/MANUFACTURER

 

Pfeiffer, Arno, Inc, Greenbush, WI. by conversation on February 5, 2007.

 

Firm initiated recall is ongoing.

 

REASON

 

Blood meal used to make cattle feed was recalled because it was cross- contaminated with prohibited bovine meat and bone meal that had been manufactured on common equipment and labeling did not bear cautionary BSE statement.

 

VOLUME OF PRODUCT IN COMMERCE

 

42,090 lbs.

 

DISTRIBUTION

 

WI

 

___________________________________

 

PRODUCT

 

Custom dairy premix products: MNM ALL PURPOSE Pellet, HILLSIDE/CDL Prot- Buffer Meal, LEE, M.-CLOSE UP PX Pellet, HIGH DESERT/ GHC LACT Meal, TATARKA, M CUST PROT Meal, SUNRIDGE/CDL PROTEIN Blend, LOURENZO, K PVM DAIRY Meal, DOUBLE B DAIRY/GHC LAC Mineral, WEST PIONT/GHC CLOSEUP Mineral, WEST POINT/GHC LACT Meal, JENKS, J/COMPASS PROTEIN Meal, COPPINI - 8# SPECIAL DAIRY Mix, GULICK, L-LACT Meal (Bulk), TRIPLE J - PROTEIN/LACTATION, ROCK CREEK/GHC MILK Mineral, BETTENCOURT/GHC S.SIDE MK-MN, BETTENCOURT #1/GHC MILK MINR, V&C DAIRY/GHC LACT Meal, VEENSTRA, F/GHC LACT Meal, SMUTNY, A- BYPASS ML W/SMARTA, Recall # V-025-2007

 

CODE

 

The firm does not utilize a code - only shipping documentation with commodity and weights identified.

 

RECALLING FIRM/MANUFACTURER

 

Rangen, Inc, Buhl, ID, by letters on February 13 and 14, 2007. Firm initiated recall is complete.

 

REASON

 

Products manufactured from bulk feed containing blood meal that was cross contaminated with prohibited meat and bone meal and the labeling did not bear cautionary BSE statement.

 

VOLUME OF PRODUCT IN COMMERCE

 

9,997,976 lbs.

 

DISTRIBUTION

 

ID and NV

 

END OF ENFORCEMENT REPORT FOR MARCH 21, 2007

 


 

Sunday, December 15, 2013

 

*** FDA PART 589 -- SUBSTANCES PROHIBITED FROM USE IN ANIMAL FOOD OR FEED VIOLATIONS OFFICIAL ACTION INDICATED OIA UPDATE DECEMBER 2013 UPDATE ***

 


 

Tuesday, August 12, 2014 Maine Firm Recalls Ribeye and Carcass Products That May Contain Specified Risk Materials

 

Class II Recall

 

Health Risk: Low

 

August 29, 2014

 

MAINE, August 29, 2014 – Bubier Meats, an establishment in Greene, Maine is recalling approximately 25,192 pounds of fresh beef products because the dorsal root ganglia may not have been completely removed, which is not compliant with federal regulations that require their removal in cattle 30 months of age and older, the Maine Meat and Poultry Inspection (MMPI) program announced today.

 

The products subject to recall include:

 

• Quartered beef carcasses that were stamped with the Maine mark of inspection and establishment number “EST. 4.” with the following ship dates: 11/13/13, 11/26/13, 1/2/14, 1/21/14, 2/5/14, 2/19/14, 3/5/14, 3/19/14, 4/2/14, 4/30/14, 5/12/14, 5/28/14, 6/11/14, 6/25/14, 7/9/14, 7/23/14, 8/6/14, 8/20/14.

 

Bubier Meats advises that the quartered carcasses were distributed to Maine retail stores, Rosemont Market locations in Portland and Yarmouth, and Maine Meat in Kittery Maine, on various dates between November, 2013 and August, 2014. All products would have been processed into smaller cuts with no identifying consumer packaging. Such smaller cuts may include bone-in ribeye roasts, prime rib roasts, T-bone steaks, porterhouse steaks, wing steaks, bone-in ribeye steaks, bone-in sirloin steaks and neck bones.

 

The problem was discovered by MMPI during a review of company slaughter logs. Dorsal root ganglia, branches of the nervous system located in the vertebral column are considered specified risk materials (SRMs) and must be removed from cattle 30 months of age and older in accordance with federal regulations. SRMs are tissues that may contain the infective agent in cattle infected with Bovine Spongiform Encephalopathy (BSE), as well as materials that are closely associated with these potentially infective tissues. Although BSE is extremely rare (only 4 US cows have been identified to date) it remains a human health concern. Therefore, federal regulations prohibit SRMs from use as human food to minimize potential human exposure to the BSE agent.

 

Every animal received ante-mortem inspection by MMPI inspection personnel, who observed each animal at rest and in motion. All animals appeared healthy with no indication that any of the cattle slaughtered displayed any signs of BSE.

 

MMPI and Bubier Meats have received no reports of adverse reactions due to consumption of these products. Anyone concerned about a reaction should contact a healthcare provider.

 

MMPI routinely conducts recall effectiveness checks to verify recalling firms notify their customers of the recall and that steps are taken to make certain that the product is no longer available to consumers.

 

Consumers and media with questions about the recall should contact establishment manager Tobie Bubier at 207-946-5015.

 

Consumers with food safety questions can “Ask Karen,” the FSIS virtual representative available 24 hours a day at askkaren.gov (http://www.askkaren.gov/)or via smartphone at m.askkaren.gov (http://m.askkaren.gov). “Ask Karen” live chat services are available Monday through Friday from 10 a.m. to 4 p.m. ET. The toll-free USDA Meat and Poultry Hotline 1-888-MPHotline (1-888-674-6854) is available in English and Spanish and can be reached from l0 a.m. to 4 p.m. (Eastern Time) Monday through Friday. Recorded food safety messages are available 24 hours a day.

 


 

> MMPI and Bubier Meats have received no reports of adverse reactions due to consumption of these products.

 

come back and tell us that in about 50 years...*** vCJD can have an incubation period of over 30 years. ..TSS

 

Tuesday, August 19, 2014

 

Former Rancho Employees Charged With 11 Felonies processed meat from 101 condemned cattle, including 79 with “cancer eye''

 


 

Saturday, June 14, 2014

 

Rep. Rosa DeLauro (D-CT) Calls for Briefing on Beef Recalled for Mad Cow Potential Rep. Rosa DeLauro (D-CT)

 


 

Thursday, June 12, 2014

 

Missouri Firm Recalls Ribeye and Carcass Products That May Contain Specified Risk Materials 4,012 pounds of fresh beef products because the dorsal root ganglia may not have been completely removed

 


 

*** Because typical clinical signs of BSE cannot always be observed in nonambulatory disabled cattle, and because evidence has indicated these cattle are more likely to have BSE than apparently healthy cattle, FDA is designating material from nonambulatory disabled cattle as prohibited cattle materials.

 


 


 


 


 

Friday, March 21, 2014

 

Rancho Dead Stock Cancer Downers Recall Explained FSIS March 20 2014 ?

 

“As of March 20, 2014, FSIS has completed all checks (effectiveness checks and disposition verification checks) for recalls 002-2014 and 013-2014 regarding Rancho Feeding Corporation. FSIS has determined that based on the number of successful checks (see Directive 8080.1, Attachment 1, Table 3) where businesses were notified of the recall and removed affected products from commerce that the recall activities were effective.”

 


 

Thursday, March 20, 2014

 

JACK IN THE BOX NOW CAUGHT UP IN MASSIVE RANCHO DEAD STOCK DOWNER CANCER COW RECALL

 


 

Thursday, March 6, 2014

 

TEXAS RECALL LIST MASSIVE FROM DEAD STOCK DOWNER CANCER COWS OFFAL from Class I Recall 002-2014 and 013-2014 Health Risk: High Jan 13, 2014 and Feb 8, 2014 shipped to Texas, Florida, and Illinois UPDATE FEBRUARY 14, 2014

 


 

Thursday, February 27, 2014

 

BEEF, CANCER, PRIONS, AND OTHER DANGEROUS AND DEADLY PATHOGENS, APPARENTLY, IT'S WHAT'S FOR DINNER

 


 

Thursday, November 28, 2013

 

Department of Justice Former Suppliers of Beef to National School Lunch Program Settle Allegations of Improper Practices and Mistreating Cows

 


 

seems USDA NSLP et al thought that it would be alright, to feed our children all across the USA, via the NSLP, DEAD STOCK DOWNER COWS, the most high risk cattle for mad cow type disease, and other dangerous pathogens, and they did this for 4 years, that was documented, then hid what they did by having a recall, one of the largest recalls ever, and they made this recall and masked the reason for the recall due to animal abuse (I do not condone animal abuse), not for the reason of the potential for these animals to have mad cow BSE type disease (or other dangerous and deadly pathogens). these TSE prion disease can lay dormant for 5, 10, 20 years, or longer, WHO WILL WATCH OUR CHILDREN FOR THE NEXT 5 DECADES FOR CJD ???

 

Saturday, September 21, 2013

 

Westland/Hallmark: 2008 Beef Recall A Case Study by The Food Industry Center January 2010 THE FLIM-FLAM REPORT

 


 

DID YOUR CHILD CONSUME SOME OF THESE DEAD STOCK DOWNER COWS, THE MOST HIGH RISK FOR MAD COW DISEASE ??? this recall was not for the welfare of the animals. ...tss you can check and see here ; (link now dead, does not work...tss)

 


 

try this link ;

 


 

Sunday, November 13, 2011

 

*** California BSE mad cow beef recall, QFC, CJD, and dead stock downer livestock

 


 

Thursday, February 13, 2014

 

HSUS VS USDA ET AL BAN DOWNER CALVES FOR HUMAN CONSUMPTION (*veal) and potential BSE risk factor there from

 


 

Saturday, November 10, 2012

 

Wisconsin Firm Recalls Beef Tongues That May Contain Specified Risk Materials Nov 9, 2012 WI Firm Recalls Beef Tongues

 


 

Saturday, July 23, 2011

 

CATTLE HEADS WITH TONSILS, BEEF TONGUES, SPINAL CORD, SPECIFIED RISK MATERIALS (SRM's) AND PRIONS, AKA MAD COW DISEASE

 


 

Sunday, October 18, 2009

 

Wisconsin Firm Recalls Beef Tongues That Contain Prohibited Materials SRM WASHINGTON, October 17, 2009

 


 

Thursday, October 15, 2009

 

Nebraska Firm Recalls Beef Tongues That Contain Prohibited Materials SRM WASHINGTON, Oct 15, 2009

 


 

Thursday, June 26, 2008

 

Texas Firm Recalls Cattle Heads That Contain Prohibited Materials

 


 

Tuesday, July 1, 2008

 

Missouri Firm Recalls Cattle Heads That Contain Prohibited Materials SRMs

 


 

Friday, August 8, 2008

 

Texas Firm Recalls Cattle Heads That Contain Prohibited Materials SRMs 941,271 pounds with tonsils not completely removed

 


 

Saturday, April 5, 2008

 

SRM MAD COW RECALL 406 THOUSAND POUNDS CATTLE HEADS WITH TONSILS KANSAS

 


 

Wednesday, April 30, 2008

 

Consumption of beef tongue: Human BSE risk associated with exposure to lymphoid tissue in bovine tongue in consideration of new research findings

 


 

Wednesday, April 30, 2008

 

Consumption of beef tongue: Human BSE risk associated with exposure to lymphoid tissue in bovine tongue in consideration of new research findings

 


 

Friday, October 15, 2010

 

BSE infectivity in the absence of detectable PrPSc accumulation in the tongue and nasal mucosa of terminally diseased cattle

 


 

SPECIFIED RISK MATERIALS SRMs

 


 

MAD COW USDA TSE PRION COVER UP or JUST IGNORANCE, for the record AUGUST 2014

 


 

Thursday, June 23, 2011

 

Experimental H-type bovine spongiform encephalopathy characterized by plaques and glial- and stellate-type prion protein deposits

 


 

Wednesday, April 25, 2012

 

4th MAD COW DISEASE U.S.A. CALIFORNIA ATYPICAL L-TYPE BSE 2012

 


 

RESPONSE TO PUBLIC COMMENTS

 

Bovine Spongiform Encephalopathy Update, October 31, 2005

 

INTRODUCTION The United States Department of Agriculture’s Food Safety and Inspection Service (FSIS) held a public meeting on July 25, 2006 in Washington, D.C. to present findings from the Harvard Risk Assessment of Bovine Spongiform Encephalopathy Update, October 31, 2005 (report and model located on the FSIS website:

 


 

Comments on technical aspects of the risk assessment were then submitted to FSIS. Comments were received from Food and Water Watch, Food Animal Concerns Trust (FACT), Farm Sanctuary, R-CALF USA, Linda A Detwiler, and Terry S. Singeltary. This document provides itemized replies to the public comments received on the 2005 updated Harvard BSE risk assessment. Please bear the following points in mind:

 


 

IN SHORT, AND IN A NUT SHELL ;

 

(Adopted by the International Committee of the OIE on 23 May 2006)

 

11. Information published by the OIE is derived from appropriate declarations made by the official Veterinary Services of Member Countries. The OIE is not responsible for inaccurate publication of country disease status based on inaccurate information or changes in epidemiological status or other significant events that were not promptly reported to the Central Bureau,

 


 

IT is of my opinion, that the OIE and the USDA et al, are the soul reason, and responsible parties, for Transmissible Spongiform Encephalopathy TSE prion diseases, including typical and atypical BSE, typical and atypical Scrapie, and all strains of CWD, and human TSE there from, spreading around the globe.

 

I have lost all confidence of this organization as a regulatory authority on animal disease, and consider it nothing more than a National Trading Brokerage for all strains of animal TSE, just to satisfy there commodity. AS i said before, OIE should hang up there jock strap now, since it appears they will buckle every time a country makes some political hay about trade protocol, commodities and futures. IF they are not going to be science based, they should do everyone a favor and dissolve there organization.

 

JUST because of low documented human body count with nvCJD and the long incubation periods, the lack of sound science being replaced by political and corporate science in relations with the fact that science has now linked some sporadic CJD with atypical BSE and atypical scrapie, and the very real threat of CWD being zoonosis, I believed the O.I.E. has failed terribly and again, I call for this organization to be dissolved. ...

 

Tuesday, July 17, 2012

 

O.I.E. BSE, CWD, SCRAPIE, TSE PRION DISEASE Final Report of the 80th General Session, 20 - 25 May 2012

 


 

USA CJD TSE PRION UNIT, TEXAS, SURVEILLANCE UPDATE NOVEMBER 2014

 

National Prion Disease Saturday, August 14, 2010 BSE

 

Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY

 


 

Pathology Surveillance Center Cases Examined1 (October 7, 2014)

 

***6 Includes 11 cases in which the diagnosis is pending, and 19 inconclusive cases;

 

***7 Includes 12 (11 from 2014) cases with type determination pending in which the diagnosis of vCJD has been excluded.

 

***The sporadic cases include 2660 cases of sporadic Creutzfeldt-Jakob disease (sCJD),

 

***50 cases of Variably Protease-Sensitive Prionopathy (VPSPr)

 

***and 21 cases of sporadic Fatal Insomnia (sFI).

 


 

CONFIRMED HUMAN BSE AKA MAD COW DISEASE vCJD TEXAS USA

 

Monday, June 02, 2014 Confirmed Variant CJD Case in Texas

 


 

SO, 4 months after the fact and still no word on this case. no information what so ever. the silence is deafening $$$

 

Monday, November 3, 2014

 

The prion protein protease sensitivity, stability and seeding activity in variably protease sensitive prionopathy brain tissue suggests molecular overlaps with sporadic Creutzfeldt-Jakob disease

 


 


 

Tuesday, November 04, 2014

 

Towards an Age-Dependent Transmission Model of Acquired and Sporadic Creutzfeldt-Jakob Disease

 


 

Thursday, August 12, 2010

 

Seven main threats for the future linked to prions

 

***Also, a link is suspected between atypical BSE and some apparently sporadic cases of Creutzfeldt-Jakob disease in humans. These atypical BSE cases constitute an unforeseen first threat that could sharply modify the European approach to prion diseases.

 

Second threat

 

snip...

 


 

Monday, October 10, 2011

 

EFSA Journal 2011 The European Response to BSE: A Success Story

 

snip...

 

*** but the possibility that a small proportion of human cases so far classified as "sporadic" CJD are of zoonotic origin could not be excluded. Moreover, transmission experiments to non-human primates suggest that some TSE agents in addition to Classical BSE prions in cattle (namely L-type Atypical BSE, Classical BSE in sheep, transmissible mink encephalopathy (TME) and chronic wasting disease (CWD) agents) might have zoonotic potential.

 

snip...

 


 


 

Sunday, August 09, 2009

 

CJD...Straight talk with...James Ironside...and...Terry Singeltary... 2009

 


 

Tuesday, August 18, 2009

 

BSE-The Untold Story - joe gibbs and singeltary 1999 – 2009

 


 

Saturday, June 14, 2014

 

Rep. Rosa DeLauro (D-CT) Calls for Briefing on Beef Recalled for Mad Cow Potential Rep. Rosa DeLauro (D-CT)

 


 

Thursday, June 12, 2014

 

Missouri Firm Recalls Ribeye and Carcass Products That May Contain Specified Risk Materials 4,012 pounds of fresh beef products because the dorsal root ganglia may not have been completely removed

 


 

Tuesday, November 04, 2014

 

The pathological and molecular but not clinical phenotypes are maintained after second passage of experimental atypical bovine spongiform encephalopathy in cattle

 


 

CHRONIC WASTING DISEASE CWD TSE PRION

 

>>> According to the Centers for Disease Control and Prevention (CDC) and the World Health Organization, there is no evidence CWD can be transmitted to humans, but it is still wise to not consume any part of an animal that shows signs of CWD.

 

NOW, what is the latest on human risk factors to CWD strains ???

 

*** PPo3-7: Prion Transmission from Cervids to Humans is Strain-dependent

 

*** Here we report that a human prion strain that had adopted the cervid prion protein (PrP) sequence through passage in cervidized transgenic mice efficiently infected transgenic mice expressing human PrP,

 

*** indicating that the species barrier from cervid to humans is prion strain-dependent and humans can be vulnerable to novel cervid prion strains.

 

PPo2-27:

 

Generation of a Novel form of Human PrPSc by Inter-species Transmission of Cervid Prions

 

*** Our findings suggest that CWD prions have the capability to infect humans, and that this ability depends on CWD strain adaptation, implying that the risk for human health progressively increases with the spread of CWD among cervids.

 

PPo2-7:

 

Biochemical and Biophysical Characterization of Different CWD Isolates

 

*** The data presented here substantiate and expand previous reports on the existence of different CWD strains.

 


 

Envt.07:

 

Pathological Prion Protein (PrPTSE) in Skeletal Muscles of Farmed and Free Ranging White-Tailed Deer Infected with Chronic Wasting Disease

 

***The presence and seeding activity of PrPTSE in skeletal muscle from CWD-infected cervids suggests prevention of such tissue in the human diet as a precautionary measure for food safety, pending on further clarification of whether CWD may be transmissible to humans.

 


 

>>>CHRONIC WASTING DISEASE , THERE WAS NO ABSOLUTE BARRIER TO CONVERSION OF THE HUMAN PRION PROTEIN<<<

 

*** PRICE OF CWD TSE PRION POKER GOES UP 2014 ***

 

Transmissible Spongiform Encephalopathy TSE PRION update January 2, 2014

 

Wednesday, January 01, 2014

 

Molecular Barriers to Zoonotic Transmission of Prions

 

*** chronic wasting disease, there was no absolute barrier to conversion of the human prion protein.

 

*** Furthermore, the form of human PrPres produced in this in vitro assay when seeded with CWD, resembles that found in the most common human prion disease, namely sCJD of the MM1 subtype.

 


 


 

PRION2013 CONGRESSIONAL ABSTRACTS CWD

 

Sunday, August 25, 2013

 

HD.13: CWD infection in the spleen of humanized transgenic mice

 

***These results indicate that the CWD prion may have the potential to infect human peripheral lymphoid tissues.

 

Oral.15: Molecular barriers to zoonotic prion transmission: Comparison of the ability of sheep, cattle and deer prion disease isolates to convert normal human prion protein to its pathological isoform in a cell-free system ***However, they also show that there is no absolute barrier to conversion of human prion protein in the case of chronic wasting disease.

 

PRION2013 CONGRESSIONAL ABSTRACTS CWD

 

Sunday, August 25, 2013

 

***Chronic Wasting Disease CWD risk factors, humans, domestic cats, blood, and mother to offspring transmission

 


 

there is in fact evidence that the potential for cwd transmission to humans can NOT be ruled out.

 

I thought your readers and hunters and those that consume the venison, should have all the scientific facts, personally, I don’t care what you eat, but if it effects me and my family down the road, it should then concern everyone, and the potential of iatrogenic transmission of the TSE prion is real i.e. ‘friendly fire’, medical, surgical, dental, blood, tissue, and or products there from...like deer antler velvet and TSE prions and nutritional supplements there from, all a potential risk factor that should not be ignored or silenced. ...

 

the prion gods at the cdc state that there is ;

 

''no strong evidence''

 

but let's see exactly what the authors of this cwd to human at the cdc state ;

 

now, let’s see what the authors said about this casual link, personal communications years ago. see where it is stated NO STRONG evidence. so, does this mean there IS casual evidence ????

 

“Our conclusion stating that we found no strong evidence of CWD transmission to humans”

 

From: TSS (216-119-163-189.ipset45.wt.net)

 

Subject: CWD aka MAD DEER/ELK TO HUMANS ???

 

Date: September 30, 2002 at 7:06 am PST

 

From: "Belay, Ermias"

 

To:

 

Cc: "Race, Richard (NIH)" ; ; "Belay, Ermias"

 

Sent: Monday, September 30, 2002 9:22 AM

 

Subject: RE: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS

 

Dear Sir/Madam,

 

In the Archives of Neurology you quoted (the abstract of which was attached to your email), we did not say CWD in humans will present like variant CJD.

 

That assumption would be wrong. I encourage you to read the whole article and call me if you have questions or need more clarification (phone: 404-639-3091). Also, we do not claim that "no-one has ever been infected with prion disease from eating venison." Our conclusion stating that we found no strong evidence of CWD transmission to humans in the article you quoted or in any other forum is limited to the patients we investigated.

 

Ermias Belay, M.D. Centers for Disease Control and Prevention

 

-----Original Message-----

 

From:

 

Sent: Sunday, September 29, 2002 10:15 AM

 

To: rr26k@nih.gov; rrace@niaid.nih.gov; ebb8@CDC.GOV

 

Subject: TO CDC AND NIH - PUB MED- 3 MORE DEATHS - CWD - YOUNG HUNTERS

 

Sunday, November 10, 2002 6:26 PM ......snip........end..............TSS

 

Thursday, April 03, 2008

 

A prion disease of cervids: Chronic wasting disease

 

2008 1: Vet Res. 2008 Apr 3;39(4):41

 

A prion disease of cervids: Chronic wasting disease

 

Sigurdson CJ.

 

snip...

 

*** twenty-seven CJD patients who regularly consumed venison were reported to the Surveillance Center***,

 

snip...

 

full text ;

 


 


 


 

***********CJD REPORT 1994 increased risk for consumption of veal and venison and lamb***********

 

CREUTZFELDT JAKOB DISEASE SURVEILLANCE IN THE UNITED KINGDOM THIRD ANNUAL REPORT AUGUST 1994

 

Consumption of venison and veal was much less widespread among both cases and controls. For both of these meats there was evidence of a trend with increasing frequency of consumption being associated with increasing risk of CJD. (not nvCJD, but sporadic CJD...tss)

 

These associations were largely unchanged when attention was restricted to pairs with data obtained from relatives. ...

 

Table 9 presents the results of an analysis of these data.

 

There is STRONG evidence of an association between ‘’regular’’ veal eating and risk of CJD (p = .0.01).

 

Individuals reported to eat veal on average at least once a year appear to be at 13 TIMES THE RISK of individuals who have never eaten veal.

 

There is, however, a very wide confidence interval around this estimate. There is no strong evidence that eating veal less than once per year is associated with increased risk of CJD (p = 0.51).

 

The association between venison eating and risk of CJD shows similar pattern, with regular venison eating associated with a 9 FOLD INCREASE IN RISK OF CJD (p = 0.04).

 

There is some evidence that risk of CJD INCREASES WITH INCREASING FREQUENCY OF LAMB EATING (p = 0.02).

 

The evidence for such an association between beef eating and CJD is weaker (p = 0.14). When only controls for whom a relative was interviewed are included, this evidence becomes a little STRONGER (p = 0.08).

 

snip...

 

It was found that when veal was included in the model with another exposure, the association between veal and CJD remained statistically significant (p = < 0.05 for all exposures), while the other exposures ceased to be statistically significant (p = > 0.05).

 

snip...

 

In conclusion, an analysis of dietary histories revealed statistical associations between various meats/animal products and INCREASED RISK OF CJD. When some account was taken of possible confounding, the association between VEAL EATING AND RISK OF CJD EMERGED AS THE STRONGEST OF THESE ASSOCIATIONS STATISTICALLY. ...

 

snip...

 

In the study in the USA, a range of foodstuffs were associated with an increased risk of CJD, including liver consumption which was associated with an apparent SIX-FOLD INCREASE IN THE RISK OF CJD. By comparing the data from 3 studies in relation to this particular dietary factor, the risk of liver consumption became non-significant with an odds ratio of 1.2 (PERSONAL COMMUNICATION, PROFESSOR A. HOFMAN. ERASMUS UNIVERSITY, ROTTERDAM). (???...TSS)

 

snip...see full report ;

 


 

Thursday, October 10, 2013

 

*************CJD REPORT 1994 increased risk for consumption of veal and venison and lamb**************

 


 

CJD9/10022

 

October 1994

 

Mr R.N. Elmhirst Chairman British Deer Farmers Association Holly Lodge Spencers Lane BerksWell Coventry CV7 7BZ

 

Dear Mr Elmhirst,

 

CREUTZFELDT-JAKOB DISEASE (CJD) SURVEILLANCE UNIT REPORT

 

Thank you for your recent letter concerning the publication of the third annual report from the CJD Surveillance Unit. I am sorry that you are dissatisfied with the way in which this report was published.

 

The Surveillance Unit is a completely independant outside body and the Department of Health is committed to publishing their reports as soon as they become available. In the circumstances it is not the practice to circulate the report for comment since the findings of the report would not be amended. In future we can ensure that the British Deer Farmers Association receives a copy of the report in advance of publication.

 

The Chief Medical Officer has undertaken to keep the public fully informed of the results of any research in respect of CJD. This report was entirely the work of the unit and was produced completely independantly of the the Department.

 

The statistical results reqarding the consumption of venison was put into perspective in the body of the report and was not mentioned at all in the press release. Media attention regarding this report was low key but gave a realistic presentation of the statistical findings of the Unit. This approach to publication was successful in that consumption of venison was highlighted only once by the media ie. in the News at one television proqramme.

 

I believe that a further statement about the report, or indeed statistical links between CJD and consumption of venison, would increase, and quite possibly give damaging credence, to the whole issue. From the low key media reports of which I am aware it seems unlikely that venison consumption will suffer adversely, if at all.

 


 

iatrogenic human CWD as sporadic CJD, what if ???

 

*** our results raise the possibility that CJD cases classified as VV1 may include cases caused by iatrogenic transmission of sCJD-MM1 prions or food-borne infection by type 1 prions from animals, e.g., chronic wasting disease prions in cervid. In fact, two CJD-VV1 patients who hunted deer or consumed venison have been reported (40, 41). The results of the present study emphasize the need for traceback studies and careful re-examination of the biochemical properties of sCJD-VV1 prions. ***

 


 

snip...see full text ;

 


 

Thursday, January 2, 2014

 

*** CWD TSE Prion in cervids to hTGmice, Heidenhain Variant Creutzfeldt-Jacob Disease MM1 genotype, and iatrogenic CJD ??? ***

 


 

*** We hypothesize that both BSE prions and CWD prions passaged through felines will seed human recPrP more efficiently than BSE or CWD from the original hosts, evidence that the new host will dampen the species barrier between humans and BSE or CWD. The new host effect is particularly relevant as we investigate potential means of trans-species transmission of prion disease.

 


 

Monday, August 8, 2011

 

*** Susceptibility of Domestic Cats to CWD Infection ***

 

Oral.29: Susceptibility of Domestic Cats to CWD Infection

 

Amy Nalls, Nicholas J. Haley, Jeanette Hayes-Klug, Kelly Anderson, Davis M. Seelig, Dan S. Bucy, Susan L. Kraft, Edward A. Hoover and Candace K. Mathiason†

 

Colorado State University; Fort Collins, CO USA†Presenting author; Email: ckm@lamar.colostate.edu

 

Domestic and non-domestic cats have been shown to be susceptible to one prion disease, feline spongiform encephalopathy (FSE), thought to be transmitted through consumption of bovine spongiform encephalopathy (BSE) contaminated meat. Because domestic and free ranging felids scavenge cervid carcasses, including those in CWD affected areas, we evaluated the susceptibility of domestic cats to CWD infection experimentally. Groups of n = 5 cats each were inoculated either intracerebrally (IC) or orally (PO) with CWD deer brain homogenate. Between 40–43 months following IC inoculation, two cats developed mild but progressive symptoms including weight loss, anorexia, polydipsia, patterned motor behaviors and ataxia—ultimately mandating euthanasia. Magnetic resonance imaging (MRI) on the brain of one of these animals (vs. two age-matched controls) performed just before euthanasia revealed increased ventricular system volume, more prominent sulci, and T2 hyperintensity deep in the white matter of the frontal hemisphere and in cortical grey distributed through the brain, likely representing inflammation or gliosis. PrPRES and widely distributed peri-neuronal vacuoles were demonstrated in the brains of both animals by immunodetection assays. No clinical signs of TSE have been detected in the remaining primary passage cats after 80 months pi. Feline-adapted CWD was sub-passaged into groups (n=4 or 5) of cats by IC, PO, and IP/SQ routes. Currently, at 22 months pi, all five IC inoculated cats are demonstrating abnormal behavior including increasing aggressiveness, pacing, and hyper responsiveness.

 

*** Two of these cats have developed rear limb ataxia. Although the limited data from this ongoing study must be considered preliminary, they raise the potential for cervid-to-feline transmission in nature.

 


 


 

AD.63:

 

Susceptibility of domestic cats to chronic wasting disease

 

Amy V.Nalls,1 Candace Mathiason,1 Davis Seelig,2 Susan Kraft,1 Kevin Carnes,1 Kelly Anderson,1 Jeanette Hayes-Klug1 and Edward A. Hoover1 1Colorado State University; Fort Collins, CO USA; 2University of Minnesota; Saint Paul, MN USA

 

Domestic and nondomestic cats have been shown to be susceptible to feline spongiform encephalopathy (FSE), almost certainly caused by consumption of bovine spongiform encephalopathy (BSE)-contaminated meat. Because domestic and free-ranging nondomestic felids scavenge cervid carcasses, including those in areas affected by chronic wasting disease (CWD), we evaluated the susceptibility of the domestic cat (Felis catus) to CWD infection experimentally. Cohorts of 5 cats each were inoculated either intracerebrally (IC) or orally (PO) with CWD-infected deer brain. At 40 and 42 mo post-inoculation, two IC-inoculated cats developed signs consistent with prion disease, including a stilted gait, weight loss, anorexia, polydipsia, patterned motor behaviors, head and tail tremors, and ataxia, and progressed to terminal disease within 5 mo. Brains from these two cats were pooled and inoculated into cohorts of cats by IC, PO, and intraperitoneal and subcutaneous (IP/SC) routes. Upon subpassage, feline-adapted CWD (FelCWD) was transmitted to all IC-inoculated cats with a decreased incubation period of 23 to 27 mo. FelCWD was detected in the brains of all the symptomatic cats by western blotting and immunohistochemistry and abnormalities were seen in magnetic resonance imaging, including multifocal T2 fluid attenuated inversion recovery (FLAIR) signal hyper-intensities, ventricular size increases, prominent sulci, and white matter tract cavitation. Currently, 3 of 4 IP/SQ and 2 of 4 PO inoculared cats have developed abnormal behavior patterns consistent with the early stage of feline CWD.

 

*** These results demonstrate that CWD can be transmitted and adapted to the domestic cat, thus raising the issue of potential cervid-to- feline transmission in nature.

 


 

www.landesbioscience.com

 

PO-081: Chronic wasting disease in the cat— Similarities to feline spongiform encephalopathy (FSE)

 


 


 

FELINE SPONGIFORM ENCEPHALOPATHY FSE

 


 


 

PRION CONFERENCE 2014 HELD IN ITALY RECENTLY CWD BSE TSE UPDATE

 

> First transmission of CWD to transgenic mice over-expressing bovine prion protein gene (TgSB3985)

 

PRION 2014 - PRIONS: EPIGENETICS and NEURODEGENERATIVE DISEASES – Shaping up the future of prion research

 

Animal TSE Workshop 10.40 – 11.05 Talk Dr. L. Cervenakova First transmission of CWD to transgenic mice over-expressing bovine prion protein gene (TgSB3985)

 


 

P.126: Successful transmission of chronic wasting disease (CWD) into mice over-expressing bovine prion protein (TgSB3985)

 

Larisa Cervenakova,1 Christina J Sigurdson,2 Pedro Piccardo,3 Oksana Yakovleva,1 Irina Vasilyeva,1 Jorge de Castro,1 Paula Saá,1 and Anton Cervenak1 1American Red Cross, Holland Laboratory; Rockville, MD USA; 2University of California; San Diego, CA USA; 3Lab TSE/OBRR /CBER/FDA; Rockville, MD USA

 

Keywords: chronic wasting disease, transmission, transgenic mouse, bovine prion protein

 

Background. CWD is a disease affecting wild and farmraised cervids in North America. Epidemiological studies provide no evidence of CWD transmission to humans. Multiple attempts have failed to infect transgenic mice expressing human PRNP gene with CWD. The extremely low efficiency of PrPCWD to convert normal human PrPC in vitro provides additional evidence that transmission of CWD to humans cannot be easily achieved. However, a concern about the risk of CWD transmission to humans still exists. This study aimed to establish and characterize an experimental model of CWD in TgSB3985 mice with the following attempt of transmission to TgHu mice.

 

Materials and Methods. TgSB3985 mice and wild-type FVB/ NCrl mice were intracranially injected with 1% brain homogenate from a CWD-infected Tga20 mouse (CWD/Tga20). TgSB3985 and TgRM (over-expressing human PrP) were similarly injected with 5% brain homogenates from CWD-infected white-tailed deer (CWD/WTD) or elk (CWD/Elk). Animals were observed for clinical signs of neurological disease and were euthanized when moribund. Brains and spleens were removed from all mice for PrPCWD detection by Western blotting (WB). A histological analysis of brains from selected animals was performed: brains were scored for the severity of spongiform change, astrogliosis, and PrPCWD deposition in ten brain regions.

 

Results. Clinical presentation was consistent with TSE. More than 90% of TgSB3985 and wild-type mice infected with CWD/Tga20, tested positive for PrPres in the brain but only mice in the latter group carried PrPCWD in their spleens. We found evidence for co-existence or divergence of two CWD/ Tga20 strains based on biochemical and histological profiles. In TgSB3985 mice infected with CWD-elk or CWD-WTD, no animals tested positive for PrPCWD in the brain or in the spleen by WB. However, on neuropathological examination we found presence of amyloid plaques that stained positive for PrPCWD in three CWD/WTD- and two CWD/Elk-infected TgSB3985 mice. The neuropathologic profiles in CWD/WTD- and CWD/Elkinfected mice were similar but unique as compared to profiles of BSE, BSE-H or CWD/Tg20 agents propagated in TgSB3985 mice. None of CWD-infected TgRM mice tested positive for PrPCWD by WB or by immunohistochemical detection.

 

Conclusions. To our knowledge, this is the first established experimental model of CWD in TgSB3985. We found evidence for co-existence or divergence of two CWD strains adapted to Tga20 mice and their replication in TgSB3985 mice. Finally, we observed phenotypic differences between cervid-derived CWD and CWD/Tg20 strains upon propagation in TgSB3985 mice. Further studies are underway to characterize these strains.

 

PRION 2014 CONFERENCE

 

CHRONIC WASTING DISEASE CWD

 

A FEW FINDINGS ;

 

Conclusions. To our knowledge, this is the first established experimental model of CWD in TgSB3985. We found evidence for co-existence or divergence of two CWD strains adapted to Tga20 mice and their replication in TgSB3985 mice. Finally, we observed phenotypic differences between cervid-derived CWD and CWD/Tg20 strains upon propagation in TgSB3985 mice. Further studies are underway to characterize these strains.

 

We conclude that TSE infectivity is likely to survive burial for long time periods with minimal loss of infectivity and limited movement from the original burial site. However PMCA results have shown that there is the potential for rainwater to elute TSE related material from soil which could lead to the contamination of a wider area. These experiments reinforce the importance of risk assessment when disposing of TSE risk materials.

 

The results show that even highly diluted PrPSc can bind efficiently to polypropylene, stainless steel, glass, wood and stone and propagate the conversion of normal prion protein. For in vivo experiments, hamsters were ic injected with implants incubated in 1% 263K-infected brain homogenate. Hamsters, inoculated with 263K-contaminated implants of all groups, developed typical signs of prion disease, whereas control animals inoculated with non-contaminated materials did not.

 

Our data establish that meadow voles are permissive to CWD via peripheral exposure route, suggesting they could serve as an environmental reservoir for CWD. Additionally, our data are consistent with the hypothesis that at least two strains of CWD circulate in naturally-infected cervid populations and provide evidence that meadow voles are a useful tool for CWD strain typing.

 

Conclusion. CWD prions are shed in saliva and urine of infected deer as early as 3 months post infection and throughout the subsequent >1.5 year course of infection. In current work we are examining the relationship of prionemia to excretion and the impact of excreted prion binding to surfaces and particulates in the environment.

 

Conclusion. CWD prions (as inferred by prion seeding activity by RT-QuIC) are shed in urine of infected deer as early as 6 months post inoculation and throughout the subsequent disease course. Further studies are in progress refining the real-time urinary prion assay sensitivity and we are examining more closely the excretion time frame, magnitude, and sample variables in relationship to inoculation route and prionemia in naturally and experimentally CWD-infected cervids.

 

Conclusions. Our results suggested that the odds of infection for CWD is likely controlled by areas that congregate deer thus increasing direct transmission (deer-to-deer interactions) or indirect transmission (deer-to-environment) by sharing or depositing infectious prion proteins in these preferred habitats. Epidemiology of CWD in the eastern U.S. is likely controlled by separate factors than found in the Midwestern and endemic areas for CWD and can assist in performing more efficient surveillance efforts for the region.

 

Conclusions. During the pre-symptomatic stage of CWD infection and throughout the course of disease deer may be shedding multiple LD50 doses per day in their saliva. CWD prion shedding through saliva and excreta may account for the unprecedented spread of this prion disease in nature.

 

P.28: Modeling prion species barriers and the new host effect using RT-QuIC

 

Kristen A Davenport, Davin M Henderson, Candace K Mathiason, and Edward A Hoover Prion Research Center; Colorado State University; Fort Collins, CO USA

 

The propensity for trans-species prion transmission is related to the structural characteristics of the enciphering and heterologous PrP, but the exact mechanism remains mostly mysterious.

 

Studies of the effects of primary or tertiary prion protein www.landesbioscience.com Prion 37 structures on trans-species prion transmission have relied upon animal bioassays, making the influence of prion protein structure vs. host co-factors (e.g. cellular constituents, trafficking, and innate immune interactions) difficult to dissect.

 

As an alternative strategy, we are using real-time quaking-induced conversion (RT-QuIC) to investigate the propensity for and the kinetics of trans-species prion conversion. RT-QuIC has the advantage of providing more defined conditions of seeded conversion to study the specific role of native PrP:PrPRES interactions as a component of the species barrier.

 

We are comparing chronic wasting disease (CWD) and bovine spongiform encephalopathy (BSE) prions by seeding each prion into its native host recPrP (full-length bovine recPrP, or white tail deer recPrP) vs. into the heterologous species. Upon establishing the characteristics of intra-species and inter-species prion seeding for CWD and BSE prions, we will evaluate the seeding kinetics and cross-species seeding efficiencies of BSE and CWD passaged into a common new host—feline—shown to be a permissive host for both CWD and BSE.

 

*** We hypothesize that both BSE prions and CWD prions passaged through felines will seed human recPrP more efficiently than BSE or CWD from the original hosts, evidence that the new host will dampen the species barrier between humans and BSE or CWD. The new host effect is particularly relevant as we investigate potential means of trans-species transmission of prion disease.

 


 

Tuesday, November 04, 2014

 

Six-year follow-up of a point-source exposure to CWD contaminated venison in an Upstate New York community: risk behaviours and health outcomes 2005–2011

 


 

Sunday, August 24, 2014

 

USAHA 117TH ANNUAL MEETING USDA-APHIS–VS CWD Herd Certification Program Goals TSE PRION October 17 – 23, 2013

 


 

SCRAPIE TSE PRION DISEASE

 

*** OIE GROUP RECOMMENDS THAT SCRAPE PRION DISEASE BE DELISTED, WISHES TO CONTINUE SPREADING IT AROUND THE GLOBE

 


 

Monday, November 30, 2009

 

*** USDA AND OIE COLLABORATE TO EXCLUDE ATYPICAL SCRAPIE NOR-98 ANIMAL HEALTH CODE, DOES NOT SURPRISE ME $

 


 

why do we not want to do TSE transmission studies on chimpanzees $

 

5. A positive result from a chimpanzee challenged severly would likely create alarm in some circles even if the result could not be interpreted for man. I have a view that all these agents could be transmitted provided a large enough dose by appropriate routes was given and the animals kept long enough. Until the mechanisms of the species barrier are more clearly understood it might be best to retain that hypothesis.

 

snip...

 

R. BRADLEY

 


 

1: J Infect Dis 1980 Aug;142(2):205-8

 

Oral transmission of kuru, Creutzfeldt-Jakob disease, and scrapie to nonhuman primates.

 

Gibbs CJ Jr, Amyx HL, Bacote A, Masters CL, Gajdusek DC.

 

Kuru and Creutzfeldt-Jakob disease of humans and scrapie disease of sheep and goats were transmitted to squirrel monkeys (Saimiri sciureus) that were exposed to the infectious agents only by their nonforced consumption of known infectious tissues. The asymptomatic incubation period in the one monkey exposed to the virus of kuru was 36 months; that in the two monkeys exposed to the virus of Creutzfeldt-Jakob disease was 23 and 27 months, respectively; and that in the two monkeys exposed to the virus of scrapie was 25 and 32 months, respectively. Careful physical examination of the buccal cavities of all of the monkeys failed to reveal signs or oral lesions. One additional monkey similarly exposed to kuru has remained asymptomatic during the 39 months that it has been under observation.

 

snip...

 

The successful transmission of kuru, Creutzfeldt-Jakob disease, and scrapie by natural feeding to squirrel monkeys that we have reported provides further grounds for concern that scrapie-infected meat may occasionally give rise in humans to Creutzfeldt-Jakob disease.

 

PMID: 6997404

 


 

Recently the question has again been brought up as to whether scrapie is transmissible to man. This has followed reports that the disease has been transmitted to primates. One particularly lurid speculation (Gajdusek 1977) conjectures that the agents of scrapie, kuru, Creutzfeldt-Jakob disease and transmissible encephalopathy of mink are varieties of a single "virus". The U.S. Department of Agriculture concluded that it could "no longer justify or permit scrapie-blood line and scrapie-exposed sheep and goats to be processed for human or animal food at slaughter or rendering plants" (ARC 84/77)" The problem is emphasised by the finding that some strains of scrapie produce lesions identical to the once which characterise the human dementias"

 

Whether true or not. the hypothesis that these agents might be transmissible to man raises two considerations. First, the safety of laboratory personnel requires prompt attention. Second, action such as the "scorched meat" policy of USDA makes the solution of the acrapie problem urgent if the sheep industry is not to suffer grievously.

 

snip...

 

76/10.12/4.6

 


 

Nature. 1972 Mar 10;236(5341):73-4.

 

Transmission of scrapie to the cynomolgus monkey (Macaca fascicularis).

 

Gibbs CJ Jr, Gajdusek DC.

 

Nature 236, 73 - 74 (10 March 1972); doi:10.1038/236073a0

 

Transmission of Scrapie to the Cynomolgus Monkey (Macaca fascicularis)

 

C. J. GIBBS jun. & D. C. GAJDUSEK

 

National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, Maryland

 

SCRAPIE has been transmitted to the cynomolgus, or crab-eating, monkey (Macaca fascicularis) with an incubation period of more than 5 yr from the time of intracerebral inoculation of scrapie-infected mouse brain. The animal developed a chronic central nervous system degeneration, with ataxia, tremor and myoclonus with associated severe scrapie-like pathology of intensive astroglial hypertrophy and proliferation, neuronal vacuolation and status spongiosus of grey matter. The strain of scrapie virus used was the eighth passage in Swiss mice (NIH) of a Compton strain of scrapie obtained as ninth intracerebral passage of the agent in goat brain, from Dr R. L. Chandler (ARC, Compton, Berkshire).

 


 


 

Wednesday, February 16, 2011

 

IN CONFIDENCE

 

SCRAPIE TRANSMISSION TO CHIMPANZEES

 

IN CONFIDENCE

 


 

Sunday, December 12, 2010

 

EFSA reviews BSE/TSE infectivity in small ruminant tissues News Story 2 December 2010

 


 

Sunday, April 18, 2010

 

SCRAPIE AND ATYPICAL SCRAPIE TRANSMISSION STUDIES A REVIEW 2010

 


 

Thursday, December 23, 2010

 

Molecular Typing of Protease-Resistant Prion Protein in Transmissible Spongiform Encephalopathies of Small Ruminants, France, 2002-2009

 

Volume 17, Number 1 January 2011

 


 

Thursday, November 18, 2010

 

Increased susceptibility of human-PrP transgenic mice to bovine spongiform encephalopathy following passage in sheep

 


 

Monday, April 25, 2011

 

Experimental Oral Transmission of Atypical Scrapie to Sheep

 

Volume 17, Number 5-May 2011

 


 

Friday, February 11, 2011

 

Atypical/Nor98 Scrapie Infectivity in Sheep Peripheral Tissues

 


 

Thursday, March 29, 2012

 

atypical Nor-98 Scrapie has spread from coast to coast in the USA 2012

 

NIAA Annual Conference April 11-14, 2011San Antonio, Texas

 


 

*** Canada Increased Atypical Scrapie Detections

 

Press reports indicate that increased surveillance is catching what otherwise would have been unreported findings of atypical scrapie in sheep. In 2009, five new cases have been reported in Quebec, Ontario, Alberta, and Saskatchewan. With the exception of Quebec, all cases have been diagnosed as being the atypical form found in older animals. Canada encourages producers to join its voluntary surveillance program in order to gain scrapie-free status. The World Animal Health will not classify Canada as scrapie-free until no new cases are reported for seven years. The Canadian Sheep Federation is calling on the government to fund a wider surveillance program in order to establish the level of prevalence prior to setting an eradication date. Besides long-term testing, industry is calling for a compensation program for farmers who report unusual deaths in their flocks.

 


 

Sporadic CJD type 1 and atypical/ Nor98 scrapie are characterized by fine (reticular) deposits, see also ; All of the Heidenhain variants were of the methionine/ methionine type 1 molecular subtype.

 


 

P.5.21 Parallels between different forms of sheep scrapie and types of Creutzfeldt-Jakob disease (CJD)

 

Wiebke M. Wemheuer1, Sylvie L. Benestad2, Arne Wrede1, Wilhelm E. Wemheuer3, Tatjana Pfander1, Bjørn Bratberg2, Bertram Brenig3,Walter J. Schulz-Schaeffer1 1University Medical Center Goettingen, Germany; 2Institute of Veterinary Medicine Oslo, Norway; 3Institute of Veterinary Medicine Goettingen, Germany

 

Background: Scrapie in sheep and goats is often regarded as the archetype of prion diseases. In 1998, a new form of scrapie - atypical/Nor98 scrapie - was described that differed from classical scrapie in terms of epidemiology, Western blot profile, the distribution of pathological prion protein (PrPSc) in the body and its stability against proteinase K. In a similar way, distinct disease types exist in sporadic Creutzfeldt-Jakob disease (CJD). They differ with regard to their clinical outcome, Western blot profile and PrPSc deposition pattern in the central nervous system (CNS). Objectives: The comparison of PrPSc deposits in sheep scrapie and human sporadic CJD.

 

Methods: Tissues of the CNS of sheep with classical scrapie, sheep with atypical/Nor98 scrapie and 20 patients with sporadic CJD were examined using the sensitive Paraffin Embedded Tissue (PET) blot method. The results were compared with those obtained by immunohistochemistry. With the objective of gaining information on the protein conformation, the PrPSc of classical and atypical/Nor98 sheep scrapie and sporadic CJD was tested for its stability against denaturation with guanidine hydrochloride (GdnHCl) using a Membrane Adsorption Assay.

 

Results: The PrPSc of atypical/Nor98 scrapie cases and of CJD prion type 1 patients exhibits a mainly reticular/synaptic deposition pattern in the brain and is relatively sensitive to denaturation with GdnHCl. In contrast classical scrapie cases and CJD prion type 2 patients have a more complex PrPSc deposition pattern in common that consists of larger PrPSc aggregates and the PrPSc itself is comparatively stable against denaturation.

 

Discussion: The similarity between CJD types and scrapie types indicates that at least two comparable forms of the misfolded prion protein exist beyond species barriers and can elicit prion diseases. It seems therefore reasonable to classify classical and atypical/Nor98 scrapie - in analogy to the existing CJD types - as different scrapie types.

 


 

What if you can catch old-fashioned CJD by eating meat from a sheep infected with scrapie?

 

28 Mar 01

 

Like lambs to the slaughter 31 March 2001 by Debora MacKenzie Magazine issue 2284. Subscribe and get 4 free issues. FOUR years ago, Terry Singeltary watched his mother die horribly from a degenerative brain disease. Doctors told him it was Alzheimer's, but Singeltary was suspicious. The diagnosis didn't fit her violent symptoms, and he demanded an autopsy. It showed she had died of sporadic Creutzfeldt-Jakob disease.

 

Most doctors believe that sCJD is caused by a prion protein deforming by chance into a killer. But Singeltary thinks otherwise. He is one of a number of campaigners who say that some sCJD, like the variant CJD related to BSE, is caused by eating meat from infected animals. Their suspicions have focused on sheep carrying scrapie, a BSE-like disease that is widespread in flocks across Europe and North America.

 

Now scientists in France have stumbled across new evidence that adds weight to the campaigners' fears. To their complete surprise, the researchers found that one strain of scrapie causes the same brain damage in mice as sCJD.

 

"This means we cannot rule out that at least some sCJD may be caused by some strains of scrapie," says team member Jean-Philippe Deslys of the French Atomic Energy Commission's medical research laboratory in Fontenay-aux-Roses, south-west of Paris. Hans Kretschmar of the University of Göttingen, who coordinates CJD surveillance in Germany, is so concerned by the findings that he now wants to trawl back through past sCJD cases to see if any might have been caused by eating infected mutton or lamb.

 

Scrapie has been around for centuries and until now there has been no evidence that it poses a risk to human health. But if the French finding means that scrapie can cause sCJD in people, countries around the world may have overlooked a CJD crisis to rival that caused by BSE.

 

Deslys and colleagues were originally studying vCJD, not sCJD. They injected the brains of macaque monkeys with brain from BSE cattle, and from French and British vCJD patients. The brain damage and clinical symptoms in the monkeys were the same for all three. Mice injected with the original sets of brain tissue or with infected monkey brain also developed the same symptoms.

 

As a control experiment, the team also injected mice with brain tissue from people and animals with other prion diseases: a French case of sCJD; a French patient who caught sCJD from human-derived growth hormone; sheep with a French strain of scrapie; and mice carrying a prion derived from an American scrapie strain. As expected, they all affected the brain in a different way from BSE and vCJD. But while the American strain of scrapie caused different damage from sCJD, the French strain produced exactly the same pathology.

 

"The main evidence that scrapie does not affect humans has been epidemiology," says Moira Bruce of the neuropathogenesis unit of the Institute for Animal Health in Edinburgh, who was a member of the same team as Deslys. "You see about the same incidence of the disease everywhere, whether or not there are many sheep, and in countries such as New Zealand with no scrapie." In the only previous comparisons of sCJD and scrapie in mice, Bruce found they were dissimilar.

 

But there are more than 20 strains of scrapie, and six of sCJD. "You would not necessarily see a relationship between the two with epidemiology if only some strains affect only some people," says Deslys. Bruce is cautious about the mouse results, but agrees they require further investigation. Other trials of scrapie and sCJD in mice, she says, are in progress.

 

People can have three different genetic variations of the human prion protein, and each type of protein can fold up two different ways. Kretschmar has found that these six combinations correspond to six clinical types of sCJD: each type of normal prion produces a particular pathology when it spontaneously deforms to produce sCJD.

 

But if these proteins deform because of infection with a disease-causing prion, the relationship between pathology and prion type should be different, as it is in vCJD. "If we look at brain samples from sporadic CJD cases and find some that do not fit the pattern," says Kretschmar, "that could mean they were caused by infection."

 

There are 250 deaths per year from sCJD in the US, and a similar incidence elsewhere. Singeltary and other US activists think that some of these people died after eating contaminated meat or "nutritional" pills containing dried animal brain. Governments will have a hard time facing activists like Singeltary if it turns out that some sCJD isn't as spontaneous as doctors have insisted.

 

Deslys's work on macaques also provides further proof that the human disease vCJD is caused by BSE. And the experiments showed that vCJD is much more virulent to primates than BSE, even when injected into the bloodstream rather than the brain. This, says Deslys, means that there is an even bigger risk than we thought that vCJD can be passed from one patient to another through contaminated blood transfusions and surgical instruments.

 


 

Monday, December 1, 2008

 

When Atypical Scrapie cross species barriers

 


 

 Dietary Risk Factors for Sporadic Creutzfeldt-Jakob Disease: A Confirmatory Case-Control Study

 

Conclusions—The a priori hypotheses were supported.

 

*Consumption of various meat products may be one method of transmission of the infectious agent for sCJD.

 


 

Transmissible Spongiform Encephalopathy TSE Prion Disease North America 2014

 

Transmissible Spongiform Encephalopathy TSE Prion Disease have now been discovered in a wide verity of species across North America. typical C-BSE, atypical L-type BASE BSE, atypical H-type BSE, atypical H-G BSE, of the bovine, typical and atypical Scrapie strains, in sheep and goats, with atypical Nor-98 Scrapie spreading coast to coast in about 5 years. Chronic Wasting Disease CWD in cervid is slowly spreading without any stopping it in Canada and the USA and now has mutated into many different strains. Transmissible Mink Encephalopathy TME outbreaks. These Transmissible Spongiform Encephalopathy TSE Prion Disease have been silently mutating and spreading in different species in North America for decades.

 

The USDA, FDA, et al have assured us of a robust Triple BSE TSE prion Firewall, of which we now know without a doubt, that it was nothing but ink on paper. Since the 1997 mad cow feed ban in the USA, literally tons and tons of banned mad cow feed has been put out into commerce, never to return, as late as December of 2013, serious, serious breaches in the FDA mad cow feed ban have been documented. The 2004 enhanced BSE surveillance program was so flawed, that one of the top TSE prion Scientist for the CDC, Dr. Paul Brown stated ; Brown, who is preparing a scientific paper based on the latest two mad cow cases to estimate the maximum number of infected cows that occurred in the United States, said he has "absolutely no confidence in USDA tests before one year ago" because of the agency's reluctance to retest the Texas cow that initially tested positive. see ; http://www.upi.com/Health_News/2006/03/15/Analysis-What-that-mad-cow-means/UPI-12841142465253/

 

The BSE surveillance and testing have also been proven to be flawed, and the GAO and OIG have both raised serious question as to just how flawed it has been (see GAO and OIG reports). North America has more documented TSE prion disease, in different documented species (excluding the Zoo BSE animals in the EU), then any other place on the Globe. This does not include the very likelihood that TSE prion disease in the domestic feline and canine have been exposed to high doses of the TSE prion disease vid pet food. To date, it’s still legal to include deer from cwd zone into pet food or deer food. Specified Risk Material i.e. SRM bans still being breach, as recently as just last month.

 

nvCJD or what they now call vCJD, another case documented in Texas last month, with very little information being released to the public on about this case? with still the same line of thought from federal officials, ‘it can’t happen here’, so another vCJD blamed on travel of a foreign animal disease from another country, while ignoring all the BSE TSE Prion risk factors we have here in the USA and Canada, and the time that this victim and others, do spend in the USA, and exposed to these risk factors, apparently do not count in any way with regard to risk factor. a flawed process of risk assessment.

 

sporadic CJD, along with new TSE prion disease in humans, of which the young are dying, of which long duration of illness from onset of symptoms to death have been documented, only to have a new name added to the pot of prion disease i.e. sporadic GSS, sporadic FFI, and or VPSPR. I only ponder how a familial type disease could be sporadic with no genetic link to any family member? when the USA is the only documented Country in the world to have documented two different cases of atypical H-type BSE, with one case being called atypical H-G BSE with the G meaning Genetic, with new science now showing that indeed atypical H-type BSE is very possible transmitted to cattle via oral transmission (Prion2014). sporadic CJD and VPSPR have been rising in Canada, USA, and the UK, with the same old excuse, better surveillance. You can only use that excuse for so many years, for so many decades, until one must conclude that CJD TSE prion cases are rising. a 48% incease in CJD in Canada is not just a blip or a reason of better surveillance, it is a mathematical rise in numbers. More and more we are seeing more humans exposed in various circumstance in the Hospital, Medical, Surgical arenas to the TSE Prion disease, and at the same time in North America, more and more humans are becoming exposed to the TSE prion disease via consumption of the TSE prion via deer and elk, cattle, sheep and goats, and for those that are exposed via or consumption, go on to further expose many others via the iatrogenic modes of transmission of the TSE prion disease i.e. friendly fire. I pondered this mode of transmission via the victims of sporadic FFI, sporadic GSS, could this be a iatrogenic event from someone sub-clinical with sFFI or sGSS ? what if?

 

Two decades have passed since Dr. Ironside first confirmed his first ten nvCJD victims in 1995. Ten years later, 2005, we had Dr. Gambetti and his first ten i.e. VPSPR in younger victims. now we know that indeed VPSPR is transmissible. yet all these TSE prion disease and victims in the USA and Canada are being pawned off as a spontaneous event, yet science has shown, the spontaneous theory has never been proven in any natural case of TSE prion disease, and scientist have warned, that they have now linked some sporadic CJD cases to atypical BSE, to atypical Scrapie, and to CWD, yet we don’t here about this in the public domain. We must make all human and animal TSE prion disease reportable in every age group, in ever state and internationally, we must have a serious re-evaluation and testing of the USA cattle herds, and we must ban interstate movement of all cervids. Any voluntary effort to do any of this will fail. Folks, we have let the industry run science far too long with regards to the TSE prion disease. While the industry and their lobbyist continues to funnel junk science to our decision policy makers, Rome burns. ...end

 

REFERENCES

 

[all scientific peer review studies and other scientific information I have put into blogs, to shorten reference data. I DO NOT advertise or make money from this, this information is for education use...lost my mom to the hvCJD, and just made a promise, never forget, and never let them forget. ...TSS]

 

Sunday, June 29, 2014

 

Transmissible Spongiform Encephalopathy TSE Prion Disease North America 2014

 


 

Self-Propagative Replication of Ab Oligomers Suggests Potential Transmissibility in Alzheimer Disease

 
Received July 24, 2014; Accepted September 16, 2014; Published November 3, 2014
 
 
Singeltary comment ;
 
 

Mom DOD 12/14/97

 

Heidenhain Variant Creutzfeldt Jakob Disease Case Report

 

snip...

 

Heidenhain Variant Creutzfeldt Jakob Disease autopsy case report 'MOM'

 

DIVISION OF NEUROPATHOLOGY University of Texas Medical Branch 114 McCullough Bldg. Galveston, Texas 77555-0785

 

FAX COVER SHEET DATE: 4-23-98

 

TO: Mr. Terry Singeltary @ -------

 

FROM: Gerald Campbell FAX: (409) 772-5315 PHONE: (409) 772-2881 Number of Pages (including cover sheet): Message:

 

*CONFIDENTIALITY NOTICE* T

 

his document accompanying this transmission contains confidential information belonging to the sender that is legally privileged. This information is intended only for the use of the individual or entry names above. If you are not the intended recipient, you are hereby notified that any disclosure, copying distribution, or the taking of any action in reliances on the contents of this telefaxed information is strictly prohibited. If you received this telefax in error, please notify us by telephone immediately to arrange for return of the original documents.

 

--------------------------

 

Patient Account: 90000014-518 Med. Rec. No.: (0160)118511Q Patient Name: POULTER, BARBARA Age: 63 YRS DOB: 10/17/34 Sex: F Admitting Race: C Attending Dr.: Date / Time Admitted : 12/14/97 1228 Copies to: UTMB University of Texas Medical Branch Galveston, Texas 77555-0543 (409) 772-1238 Fax (409) 772-5683

 

Pathology Report

 

FINAL AUTOPSY

 

DIAGNOSIS Autopsy' Office (409)772-2858

 

Autopsy NO.: AU-97-00435 AUTOPSY INFORMATION: Occupation: Unknown Birthplace: Unknown Residence: Crystal Beach Date/Time of Death: 12/14/97 13:30 Date/Time of Autopsy: 12/15/97 15:00 Pathologist/Resident: Pencil/Fernandez Service:

 

Private

 

Restriction: Brain only

 

FINAL AUTOPSY DIAGNOSIS I. Brain: Creutzfeldt-Jakob disease, Heidenhain variant.

 

snip...see full text ;

 


 


 

 

TSS

 

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